Answer:
What type of house weighs the least?
What kind of tree can you carry in your hand?
I am a nut with a hole
I am a piece of paper that takes most people 3 or 4 years to get. What am I?
When I am alive, people sing. When I am dead, people clap hands. What am I?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.