First, I need to divide the six figures into two categories based on common features or patterns. The options are given, so I should figure out what the categories might be.

Here are the figures:

• ①: Glasses

• ②: Airplane

• ③: T-shirt

• ④: Skewers with balls (like candied hawthorn or something similar)

• ⑤: Ice cream cone

• ⑥: Plant with leaves

I need to find a common characteristic for each group. Since it's a multiple-choice question, I can test the options to see which one makes sense.

Let me look at option A: ①③⑥ in one group, and ②④⑤ in the other.

Group 1: Glasses (①), T-shirt (③), Plant (⑥)

What do these have in common? Glasses are for vision, T-shirt is clothing, plant is nature. Not sure.

Group 2: Airplane (②), Skewers (④), Ice cream (⑤). Airplane is transportation, skewers are food, ice cream is food. Not very cohesive.

Option B: ①③⑤ and ②④⑥.

Group 1: Glasses (①), T-shirt (③), Ice cream (⑤)

Glasses and T-shirt are personal items, ice cream is food. Not clear.

Group 2: Airplane (②), Skewers (④), Plant (⑥). Airplane is machine, skewers are food, plant is nature. Mixed.

Option C: ①④⑥ and ②③⑤.

Group 1: Glasses (①), Skewers (④), Plant (⑥)

Glasses have two circles (lenses), skewers have multiple circles (like three balls), plant has multiple leaves. So, maybe things with circular or rounded parts.

Group 2: Airplane (②), T-shirt (③), Ice cream (⑤)

Airplane might have straight lines, T-shirt has sleeves and body, ice cream has a cone and scoops. Not sure about a common feature.

Option D: ①②④ and ③⑤⑥.

Group 1: Glasses (①), Airplane (②), Skewers (④)

Glasses and airplane might both be used for seeing or something? Airplanes are for flying, glasses for vision. Skewers are for holding food. Not obvious.

Group 2: T-shirt (③), Ice cream (⑤), Plant (⑥). Clothing, food, nature. Mixed.

I need a better way. Perhaps the classification is based on the number of parts or symmetry.

Let me list the figures again:

• ① Glasses: typically two circular lenses, connected by a frame.

• ② Airplane: has a fuselage, wings, tail, etc. Usually symmetrical.

• ③ T-shirt: has a body, sleeves, neckline. Asymmetrical shape.

• ④ Skewers: multiple spherical items on a stick. Three in this case, but could vary.

• ⑤ Ice cream cone: cone with scoops on top, usually two scoops here.

• ⑥ Plant: stem with multiple leaves, asymmetrical.

Another idea: perhaps it's about whether the figure has curved lines or straight lines.

• Glasses (①): mostly curved (lenses, frame)

• Airplane (②): mix of straight and curved (wings straight, body curved)

• T-shirt (③): curved lines for the neck, straight for sleeves and body? T-shirts have curved hems.

• Skewers (④): circles are curved, stick is straight

• Ice cream (⑤): cone has straight lines and triangle shape, scoops are curved

• Plant (⑥): curved lines for leaves and stem

This seems messy. Maybe it's about symmetry.

• Glasses (①): symmetrical left-right

• Airplane (②): usually symmetrical

• T-shirt (③): not symmetrical; the print or design might vary, but the shape can be symmetrical if folded, but generally not.

• Skewers (④): symmetrical if identical items

• Ice cream (⑤): cone is symmetrical, scoops might be stacked symmetrically

• Plant (⑥): not symmetrical; leaves are irregular

Still not clear.

Perhaps the categories are "things you wear" vs. "other things".

• Glasses (①): you wear them

• T-shirt (③): you wear it

But ice cream cone? You don't wear it. Plant? Not worn. Airplane? Not worn. Skewers? You eat from them, not wear.

So ① and ③ are wearable, but what about others? ② airplane is not wearable. ④ skewers not wearable. ⑤ ice cream not wearable. ⑥ plant not wearable. But that only gives two, need groups of three.

Option B has ①③⑤ and ②④⑥. ① and ③ wearable, ⑤ ice cream not. Doesn't fit.

Option A: ①③⑥ wearable? ⑥ plant not wearable.

Not working.

Another idea: perhaps based on the number of circular elements.

• ① Glasses: two circles (lenses)

• ② Airplane: no prominent circles; may have circular parts like wheels, but not shown.

• ③ T-shirt: no circles; usually rectangular or curved

• ④ Skewers: three circles (assuming the balls are circles)

• ⑤ Ice cream: two circles (scoops)

• ⑥ Plant: leaves might be oval, not necessarily circles, but in this drawing, they might be circular.

In the image, plant leaves are more like ovals or irregular, not perfect circles.

But let's assume the balls on skewers are circles, ice cream scoops are circles, glasses lenses are circles.

• ①: 2 circles

• ②: 0 circles (airplane has straight lines)

• ③: 0 circles (T-shirt has no circular parts)

• ④: 3 circles

• ⑤: 2 circles (scoops)

• ⑥: multiple leaves, but are they circular? Probably not; more like teardrop shapes.

So ① and ⑤ have two circles, ④ has three, ② and ③ have no circles, ⑥ has no circles.

But ② and ③ both have no circles, so they could be one group, but ⑥ also no circles, so {②,③,⑥} but that's not an option.

Options have groups of three.

Perhaps circles or rounded shapes.

• ①: rounded (lenses)

• ②: not particularly rounded; angular

• ③: has curved parts but not circular

• ④: very circular

• ⑤: circular scoops

• ⑥: leaves are rounded but not circular

Still vague.

Let's look at the answer choices again.

Perhaps it's about whether the figure is man-made or natural.

• ① Glasses: man-made

• ② Airplane: man-made

• ③ T-shirt: man-made

• ④ Skewers: man-made

• ⑤ Ice cream cone: man-made

• ⑥ Plant: natural

So ⑥ is natural, others man-made. But that would be one group of one, not three.

Not that.

Another idea: perhaps based on the function or context.

Or maybe visual similarity.

Let me sketch what each looks like.

• ①: two circles connected by a bridge, with earpieces. Symmetrical.

• ②: jet or propeller plane, with wings, tail, etc. Symmetrical.

• ③: T-shirt with short sleeves, neckline, body. Asymmetrical because of the sleeves.

• ④: three round balls on a stick, vertical arrangement. Symmetrical if balls are same size.

• ⑤: cone with two scoops on top. Symmetrical.

• ⑥: plant with stem and several leaves, asymmetrical.

So some are symmetrical, some are not.

• Symmetrical: ①, ②, ④, ⑤

• Asymmetrical: ③, ⑥

But only two asymmetrical, need groups of three.

Perhaps in the context of the problem, "symmetrical" means has a line of symmetry.

• ①: yes, vertical or horizontal symmetry.

• ②: yes, left-right symmetry.

• ③: T-shirt might have rotational symmetry if plain, but usually not; it's not symmetric because the sleeves are on one side. A T-shirt is not symmetric; if you fold it, it doesn't match perfectly. For example, the neck is wider at the front, and the body is longer, but in a simple outline, it might have reflection symmetry. But typically, T-shirt drawings are symmetric if not detailed. But in this case, the figure shows a standard T-shirt, which is symmetric left-right.

Let's assume the T-shirt is symmetric.

Similarly, skewers: if the balls are identical, it has rotational symmetry or reflection.

Ice cream: cone and scoops, usually symmetric.

Plant: not symmetric.

Glasses: symmetric.

Airplane: symmetric.

T-shirt: let's say symmetric for argument.

But plant is clearly not.

But still, only one asymmetrical.

Perhaps the classification is based on whether it has a "stem" or something.

• Glasses: no stem

• Airplane: no stem

• T-shirt: no stem

• Skewers: has a stick, like a stem

• Ice cream: cone has a point, like a stem

• Plant: has a stem

So ④,⑤,⑥ have a stem-like part.

Then ①,②,③ do not.

But in option D, it's ①②④ and ③⑤⑥, which is different.

Option D has ①②④ together, but ④ has a stem, ① and ② do not.

Not matching.

Perhaps "things with multiple similar parts".

• Glasses: two lenses

• Airplane: wings, tail, etc., but not identical

• T-shirt: sleeves, but not multiple of the same

• Skewers: multiple balls, identical

• Ice cream: multiple scoops, identical

• Plant: multiple leaves, similar

So ④,⑤,⑥ have repeated identical parts: balls, scoops, leaves.

Then ① has two lenses, which are identical, so should be included.

But ② airplane has wings, but only one pair, not multiple. Similarly, tail is single.

③ T-shirt has two sleeves, but they are part of the whole.

Perhaps ①,④,⑤ have circular repeated parts.

• ①: two circular lenses

• ④: three circular balls

• ⑤: two circular scoops

• ②: no circular repeated parts

• ③: no circular parts

• ⑥: leaves not circular

So group 1: ①,④,⑤ with circular repeated elements.

Group 2: ②,③,⑥ without such elements.

Now look at options.

Option C is ①④⑥ and ②③⑤.

But ⑥ is in the first group, but plant leaves are not typically circular, and not repeated in the same way.

In the diagram, the plant has multiple leaves, but they are not circular; they are more like ovals or teardrops.

Whereas the balls and scoops are clearly circles.

Glasses lenses are circles.

So ①,④,⑤ should be together.

Then ②,③,⑥ together.

But in the options, is there a group like ①④⑤ and ②③⑥?

Let's see the choices:

A: ①③⑥, ②④⑤ — not that

B: ①③⑤, ②④⑥ — ① and ⑤ together, but ③ not

C: ①④⑥, ②③⑤ — ① and ④ together, but ⑥ not with ⑤

D: ①②④, ③⑤⑥ — not that

None have ①④⑤ together.

Perhaps ⑥ can be considered, but I think not.

Another idea: perhaps it's about the orientation or how they are presented.

All are drawn in a similar way, side view or something.

Perhaps the number of "lobes" or something.

Let's count the number of separate items or something.

But all are single objects.

Glasses are one pair, airplane is one, T-shirt is one, skewers are one stick with multiple, ice cream is one cone, plant is one plant.

Not that.

Perhaps in terms of edibility or something, but that seems unlikely.

Another thought: perhaps based on the cultural or contextual meaning, but that might be overcomplicating.

Let's look for a pattern in the answer choices.

Perhaps it's about symmetry after all.

• ①: has reflection symmetry

• ②: has reflection symmetry

• ③: T-shirt may have reflection symmetry if designed that way; in many representations, it does.

• 4: skewers with three balls; if the balls are identical, it has rotational symmetry but not reflection symmetry unless you cut through a ball.

For example, a vertical line through the stick, it might not be symmetric because the balls are stacked.

If there are three balls, it has 120-degree rotational symmetry, but no reflection symmetry unless it's a plane with two balls, but here three, so no reflection symmetry.

Similarly, ice cream with two scoops has reflection symmetry if the cone is symmetric.

Plant has no symmetry.

Glasses have reflection symmetry.

Airplane has reflection symmetry.

T-shirt: let's assume it has reflection symmetry for simplicity, as it's a common assumption.

But for skewers with three balls, no reflection symmetry; it has only rotational symmetry.

Similarly, plant no symmetry.

Ice cream with two scoops has reflection symmetry.

So:

• Symmetric (reflection): ①,②,③,⑤

• Not symmetric: ④,⑥

Again, only two not symmetric.

But ④ has rotational symmetry, not reflection.

Perhaps the category is "has reflection symmetry" vs. "does not have reflection symmetry".

Then group 1: ①,②,③,⑤ with reflection symmetry

Group 2: ④,⑥ without

But groups are not equal size; need three each.

Unless we include ④ in not, but only two.

Perhaps for T-shirt, it's not symmetric. In many drawings, T-shirts are drawn with the neck and body not perfectly symmetric, but usually for classification, it might be considered symmetric.

But let's check online or common knowledge.

Perhaps in this context, the T-shirt is not symmetric because of the sleeves.

But I think it's a stretch.

Another idea: perhaps based on the primary shape or the dominant type of line.

• Glasses: mainly curved

• Airplane: mainly straight lines with some curves

• T-shirt: mixture of curves and straights

• Skewers: circles and a straight line

• Ice cream: curved scoops and straight cone

• Plant: curved lines

Not clear.

Perhaps "things that can be held or eaten" but not all.

Let's consider the options one by one.

Start with option B: ①③⑤ and ②④⑥

Group 1: Glasses, T-shirt, Ice cream

What do they have in common? Glasses and T-shirt are clothing, ice cream is food. Not the same.

Or personal use: glasses for vision, T-shirt for body, ice cream for consumption.

Not consistent.

Group 2: Airplane, Skewers, Plant. Airplane for transport, skewers for cooking, plant for decoration or nature. No commonality.

Option A: ①③⑥ and ②④⑤

Group 1: Glasses, T-shirt, Plant. Glasses and T-shirt are human-made for personal use, plant is natural. Not consistent.

Group 2: Airplane, Skewers, Ice cream. All could be associated with enjoyment or something, but airplane is transport, skewers and ice cream are food. Not great.

Option C: ①④⑥ and ②③⑤

Group 1: Glasses, Skewers, Plant. Glasses have two circles, skewers have three circles, plant has multiple leaves. Perhaps "things with multiple rounded parts".

Group 2: Airplane, T-shirt, Ice cream. Airplane has wings and tail, not rounded; T-shirt has a body shape; ice cream has scoops, but in group 2.

But in group 1, plant leaves are not rounded in the same way.

Perhaps "organic" vs. "mechanical", but T-shirt is not mechanical.

Another thought: perhaps it's about the number of vertices or something, but that might be too vague.

Let's count the number of enclosed areas or something.

• ① Glasses: the lenses are enclosed, so two enclosed areas.

• ② Airplane: the body might be an enclosed area, but in a simple drawing, it might not be filled; it's an outline. Typically, airplanes are drawn with lines, not filled, so no enclosed areas.

• ③ T-shirt: the body is an enclosed area, so one.

• ④ Skewers: the balls are enclosed areas, three of them.

• ⑤ Ice cream: the scoops are enclosed, two, and the cone is a triangle, which is one enclosed area if filled, but usually not; it's a outline. So the scoops are enclosed, cone might not be.

This is messy.

Perhaps in terms of the drawing style, all are outlined, so we count the number of closed shapes.

• ①: two closed shapes (lenses)

• ②: one closed shape for the body? Or multiple? In a simple jet, it might have one body and wings, but wings are not closed. So probably no closed shapes; it's all open lines.

• ③: the T-shirt body is a closed shape, so one.

• 4: three closed shapes for the balls.

• 5: two closed shapes for the scoops, and the cone is a open shape or closed? The cone can be seen as a closed shape if the base is closed, but in outline, it's often not. Let's assume the scoops are closed circles, cone is open.

• 6: each leaf might be a closed shape, but in this drawing, they are attached, so probably not closed; the whole plant is one open shape.

So:

• ①: 2 closed shapes

• ②: 0 closed shapes

• ③: 1 closed shape (body)

• ④: 3 closed shapes (balls)

• ⑤: 2 closed shapes (scoops)

• ⑥: 0 closed shapes (approximately)

So ① and ⑤ have 2 closed shapes, ④ has 3, ② and ⑥ have 0, ③ has 1.

Not grouping well.

Perhaps for the plant, if leaves are separate, but in this image, they are connected.

I think I need to think differently.

Let me look for the answer online or common types, but since it's a reasoning problem, I should reason.

Another idea: perhaps the categories are "things that are worn" and "things that are not", but only two are worn: glasses and T-shirt.

Or "things you eat": ice cream and skewers (if it's food), but skewers are the stick, but the balls are food, so ④ and ⑤, but then need a third.

Plant can be eaten, but not typically.

Not.

Perhaps "leisure items" or something.

Airplane can be for leisure, but usually not.

Let's consider the option that makes the most sense.

Perhaps it's based on the position in the list or something, but that's silly.

Another thought: in the diagram, the figures are drawn with a certain style. Notice that for glasses, airplane, T-shirt, they are solid or filled, but in the image, they are all outlines, so not.

Perhaps the common feature is that for ①,③,⑤, they have a "loop" or something.

Glasses have the frame that goes around, T-shirt has the neck and body, ice cream has the cone shape.

But airplane also has the fuselage.

Not unique.

Let's count the number of times the line changes direction or something, but that's complicated.

Perhaps it's about the concavity or convexity, but for simple shapes.

I recall that in some分类 problems, it's about the number of holes or something, but here no holes.

Glasses have the bridge, but no hole.

Another idea: perhaps "things that can be used by children" but all can.

I think I found a possible classification.

Notice that for the skewers (④), ice cream (⑤), and plant (⑥), they are all things that can be found in a natural or food context, while the others are more "tool-like" or something.

But glasses are tools, T-shirt is clothing, airplane is vehicle.

Not consistent.

Perhaps ① and ② are for vision and transport, but not a group.

Let's look at option C: ①④⑥ and ②③⑤

Group 1: Glasses, Skewers, Plant

Glasses have two circular lenses, skewers have three circular items, plant has multiple leaves that are rounded.

So all have a natural, rounded shape.

Group 2: Airplane, T-shirt, Ice cream

Airplane has sharp angles, T-shirt has straight lines and curves, ice cream has a cone which is pointy.

So group 2 has pointy or sharp features, while group 1 is more rounded.

• Glasses: rounded lenses

• Skewers: rounded balls

• Plant: rounded leaves

• Airplane: wings and tail are sharp

• T-shirt: the bottom and sleeves can be curved, but the neck is curved, no sharp points. T-shirts are soft, no sharp points.

• Ice cream: the cone has a pointy end.

So for T-shirt, it doesn't have sharp points, so it might not fit group 2.

In group 2, airplane has sharp wings, ice cream has a pointy cone, T-shirt has no sharp points.

So not consistent.

Perhaps for T-shirt, if it's a graphic T-shirt, it might have designs, but in this case, it's a plain outline.

I think the most plausible is that group 1 has things with circular elements, and group 2 does not.

But as before, ①,④,⑤ have circular elements, ②,③,⑥ do not.

But in the options, it's not directly given, but option C has ①④⑥, which includes ⑥, which may not have circular elements.

Unless the leaves are considered circular, but they are not.

Perhaps in the plant, the leaves are depicted as circular, but in the standard diagram, they are not.

Let's assume the plant has circular leaves for the sake of argument.

Then ①,④,⑤,⑥ have circular parts, but we need two groups of three.

So not.

Another idea: perhaps the categories are "symmetric" and "asymmetric", but with three each.

• Symmetric: ①,②,④,⑤ (glasses, airplane, skewers if balls identical, ice cream)

• Asymmetric: ③,⑥ (T-shirt and plant)

Only two asymmetric.

Unless the T-shirt is not symmetric. Let's check the diagram. In the image, the T-shirt is drawn with one sleeve on each side, so it is symmetric. Similarly, the plant is not.

But for the skewers with three balls, it is not reflectively symmetric; it has rotational symmetry.

Similarly, ice cream with two scoops is symmetric.

So perhaps only ③ and ⑥ are not symmetric, but we need to group.

Perhaps the classification is based on the number of axes of symmetry or something.

I think I need to consider that for the T-shirt, it is not symmetric because the neck is wider, but in a simple outline, it is often considered symmetric.

Perhaps in this context, the T-shirt is symmetric, and the plant is not, but we have to have three in a group.

Let's look at the answer choices and see which one has a common feature.

Option D: ①②④ and ③⑤⑥

Group 1: Glasses, Airplane, Skewers

What do they have in common? Glasses and airplane are both used by people (vision and transport), skewers is for food. Not clear.

Or all can be associated with hobbies: glasses for reading, airplane for models or travel, skewers for cooking.

Not strong.

Group 2: T-shirt, Ice cream, Plant. Clothing, food, nature. No commonality.

Option B: ①③⑤ and ②④⑥

Group 1: Glasses, T-shirt, Ice cream. All can be personal items: you wear glasses, wear T-shirt, eat ice cream.

Group 2: Airplane, Skewers, Plant. Airplane is not personal in the same way; it's a vehicle, skewers is a tool for food, plant is nature.

But "personal use" might work for group 1.

For group 2, airplane can be for personal transport, skewers for personal use like eating, plant for personal enjoyment.

But it's a bit stretched, but possible.

Option A: ①③⑥ and ②④⑤

Group 1: Glasses, T-shirt, Plant. Glasses and T-shirt are for the body, plant is for environment.

Not good.

Group 2: Airplane, Skewers, Ice cream. All can be associated with fun: flying, eating candy, dessert.

But not consistent.

Option C: ①④⑥ and ②③⑤

Group 1: Glasses, Skewers, Plant. All have a "stem" or central part: glasses have the bridge, skewers have the stick, plant have the stem.

Glasses have the bridge between lenses, which is central.

Skewers have the stick.

Plant have the stem.

Group 2: Airplane, T-shirt, Ice cream. Airplane has a fuselage, T-shirt has a body, ice cream has a cone, which can be seen as a central part.

So both groups have a central part.

Not distinguishing.

For group 1, the central part is not the main functional part; for glasses, the lenses are main, for skewers, the balls are main, for plant, the leaves are main.

For group 2, the central part is main: fuselage for airplane, body for T-shirt, cone for ice cream.

But that might be a possibility.

But let's see the central part: for glasses, the bridge is not the main part; the lenses are.

Similarly for skewers, the stick is support, balls are main.

For plant, stem is support, leaves are main.

For airplane, fuselage is main.

For T-shirt, body is main.

For ice cream, cone is main or scoops?

The cone is the base.

So not consistent.

Perhaps "things that are not primarily round" but most are not.

I think I found a better way.

Notice that in the diagram, for ①, ③, ⑤, they are all items that are typically used in a personal, everyday context, while ②, 4, 6 are not.

But 4 skewers are used for eating, so personal.

6 plant can be personal.

Not.

Another idea: perhaps based on the drawing, the figures are drawn with a certain number of lines or something.

But that's not it.

Let's count the number of curves or直线.

• ① Glasses: mainly curved, with some straight (earpieces)

• ② Airplane: straight lines for wings, curved for body

• ③ T-shirt: curved for neck and body, straight for sleeves? Sleeves are curved too.

• ④ Skewers: straight stick, curved balls

• ⑤ Ice cream: curved scoops, straight cone

• ⑥ Plant: curved stem and leaves

All have both, so not distinguishing.

Perhaps the majority of lines are curved or straight.

• ①: more curved (lenses, bridge) than straight (earpieces)

• ②: more straight (wings, tail) than curved (body)

• ③: more curved (body, neck) than straight (sleeves are short and straight in some drawings, but usually curved)

In a standard T-shirt, the sleeves are curved, the body is curved, neck is curved, so mostly curved.

• ④: the stick is straight, the balls are curved, so mixed

• ⑤: scoops curved, cone has straight lines, so mixed

• 6: all curved

So for ③ and 6, all curved, but others mixed.

Not groups of three.

I think I need to accept that option B might be correct with "personal items" for ①③⑤.

Glasses, T-shirt, Ice cream are all things that can be associated with an individual's daily life and comfort.

While ② Airplane is for transport, ④ Skewers is a food tool, 6 Plant is nature, which are more external or functional.

But it's a bit vague.

Perhaps in the context of the test, it's about edibility or something.

Let's see the title or context, but there's no title.

Another thought: perhaps the common feature is that ①,③,⑤ are all items that can be found in a bag or pocket, while ②,4,6 are not.

Glasses can be in a case, T-shirt in a bag, ice cream in a cone or wrapper, so portable.

Airplane is large, skewers are on a stick but not typically carried, plant is in a pot.

So for group 1: ①,③,⑤ can be carried easily.

Group 2: ②,4,6 not easily carried in that way.

But skewers can be held, but not carried around.

Similarly, a small plant can be carried, but usually not.

So perhaps.

And this matches option B: ①③⑤ and ②④⑥.

Yes, that seems reasonable.

For ④, skewers are often on a stick, but you don't carry the skewers around; you carry the food or the stick, but it's not an item you carry with you.

Similarly, airplane is not portable, plant is not usually carried.

While glasses, T-shirt, ice cream cone are personal items you carry or wear or hold.

So I think this is the classification.

So the answer should be B.

But let's confirm with the other group.

Group 2: Airplane (not portable), Skewers (not something you carry, it's a serving item), Plant (not portable in the same way).

Whereas for group 1, they are.

So yes.

Therefore, the correct classification is B: ①③⑤, ②④⑥