Answer:
Give it food and it will live, give it water and it will die.
My life can be measured in hours. I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
People are hired to get rid of me. I'm often hiding under your bed. In time I'll always return you see. Bite me and you're surely dead.
Three little letters, a paradox to some. The worse that it is, the better it becomes.
What can be forever wound up but never annoyed?
Brings the sky a lot closer.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?