Answer:
What has a mouth but can't chew?
I have legs but walk not, a strong back but work not. Two good arms but reach not. A seat but sit and tarry not.
who do you think you know but sometimes you don't
What do people want the least on their hands?
I tremble at each breath of air, and yet can heaviest burdens bear.
What is so fragile that saying its name breaks it?