Question

First it has 4 legs then 2 then 3

Answer 1

It's a human as first it crawls hence,4 legs then adult on 2 legs and old people use one stick to walk

Answer 2

A human being..... First a child walks on 4 legs(2legs and 2 hands)... Then a young man walks on his 2 legs and when he becomes old he uses a stick,so he uses 3 legs