Find the living thing who is four-legged then two-legged then three-legged?
The answer is (size 1) : Human : baby then adult then elderly using a cane
Well it is obvious but you may find people who cannot figure it out.
Lol.
I was going to answer this and for the like of me I couldn't figure out why you had the size 1... and then the post below with size 2.
It wasn't until now I saw the answer was before my eyes the whole time.
made my day