Answer:
What is the saddest fruit?
I am lighter than air, but a hundred people cannot lift me. Careful, I am fragile. What am I?
I lose my head in the morning and regain back it at night.
The person who makes me doesn't need me. The person who buys me doesn't use me. The person who uses me doesn't know it. What am I?
I am an odd number that become even when beheaded.
A little house full of meat, no door to go in and eat.