Answer:
I may seem real but it always turns out I was never there in the first place... you only see me during a certain resting stage.
When I am alive, people sing. When I am dead, people clap hands. What am I?
What can fill a room but takes up no space?
What color can you eat?
Sometimes I annoy you, sometimes you can't live without me. But no matter how hard you try, you can't destroy me. What am I?
Give it food and it will live, give it water and it will die.