Answer:
You use me from your head to your toes. The more I work, the thinner I grow. What am I?
I'm white and used for cutting and grinding. When I'm damaged, humans usually remove or fill me. For most animals I am a useful tool. What am I?
A young man wants to have me but when he has me he no longer wants me. Blade in hand he attacks me and does his best to remove me. Yet he knows that it is all in vain.
Lighter than feather and softer than silk, yet the strongest man in the world cannot hold me for more than a few minutes. What am I?
I turn everything around, but I cannot move. When you see me, you see you! What am I?
Give it food and it will live, give it water and it will die.