Answer:
A mechanism to discover who is following you.
What gets broken without being hold?
What gets colder as it warms up?
You feel this sensation when you are dehydrated.
They can be long or short; they can be grown or bought; they can be painted or left bare; they can be round or square.
Why can't Kevin, who is now living in Canada, not be buried in the USA?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?