Answer:
Humans have two that shrink in the light and expand in the dark
People want it, and when they have it, they use it by giving it
What word becomes shorter when you add two letters to it?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
if I drink I die if I eat I am fine what am i
I will disappear every time you say my name.
Easy
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?