Answer:
Humans have two that shrink in the light and expand in the dark
This is a shape and a symbol that we literally cannot live without. What is it?
It belongs to you, but other people use it more than you do. What is it?
Brings the sky a lot closer.
People want it, and when they have it, they use it by giving it
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.