Answer:
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.
You use a knife to slice my head. And weep beside me when I am dead.
Three little letters. A paradox to some. The worse that it is, the better it becomes.
What is the only letter in the alphabet that does not appear anywhere on the periodic table of elements?
I'm not man's best friend, I'm their enemy, I can mark your end, yet you do not see me, I am very small, but very tough, If you have me, then you have it rough.
The warmer I am the fresher I am.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?