Answer:
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?
I am a cave full of bones and the house of a worm.
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
I let water fall on you while everyone else stays dry. What am I?
You walk into a room with a rabbit holding a carrot, a pig eating slop, and a chimp holding a banana. Who is the smartest animal in the room?
I have feet on my head