Answer:
Something wholly unreal, yet seems real to I. Think my friend, tell me where does it lie?
My teeth are sharp, my back is straight, to cut things up it is my fate.
They can be harbored, but few hold water. You can nurse them, but only by holding them against someone else. You can carry them, but not with your arms. You can bury them, but not in the earth.
Who eats a lot of iron without getting sick?
Has feathers but can't fly. Rests on legs but can't walk.
You use it between your head and your toes, the more it works the thinner it grows.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?