Answer:
Why does Jupiter fart so much?
Why was the math teacher late to work?
What do grateful, thankful, wonderful and joyful have all in common?
What city has no people?
I have one, you have one. If you remove the first letter, a bit remains. If you remove the second, bit still remains. If you remove the third, it still remains.
Often cooked as fillet, this meat comes from an animal that swims underwater.