A bear is a tall animal. When it's white, it's polar bear. A tortoise is a slow animal. It has got a shell on its back. A mouse 's tail is long, a rabbit's tail is round and small.
Humans have two legs to walk.
Some animals have four. The neck is the part between your head and your body . The bird hasn't got arms, of course. It has got wings to fly. To climb is to go up, a tree for example.