Answer:
What kind of tree can you carry in your hand?
I am a ship that can be made to ride the greatest waves. I am not built by objects, but built by minds. What am I?
People buy me to eat but never eat me. What am I?
I soar without wings I see without eyes. I've traveled the universe to and fro. I've conquered the world yet I've never been anywhere but home.
I can generate fear and some say I come out of your ears. I am as quiet as a mouse but not welcomed in the house.
Give it food and it will live, give it water and it will die.