Answer:
It covers you, you lose it every day and you'd die without it.
A mechanism to discover who is following you.
What devours all and can kill a king. Destroy a town and crushes mountains down?
What goes up but never comes down?
When is 1500 plus 20 and 1600 minus 40 the same thing?
Cycle Cycle Cycle.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?