Answer:
What has a mouth but can't chew?
You heard me before, yet you hear me again, then I die. Until you call me again.
My life can be measured in hours. I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
There are several different kinds, but the one you pick doesn't do its job. What is it?
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.
Why was the cook arrested?