Answer:
I am a piece of paper that takes most people 3 or 4 years to get. What am I?
I'm white and I'm used for cutting and grinding. When I'm damaged people usually remove me. What am I?
I am a seed with three letters in my name. Take away the last two and I still sound the same.
I'm the source of all emotion but I'm caged in a white prison.
I'm not a bird but I can fly through the sky. I'm not a river but I'm full of water.
I stay where I am when I go off. What am I?