Answer:
Who is your mother's only sister's son's brother's aunt's daughter's sister's father?
I am used for light yet I am solid. Without me you would feel enclosed. I hate being touched especially with a lot of force. I like to be in buildings.
I am lighter than the material I am made of. You see parts of me but more of me is hidden underneath.
I am milky white and scares people.
What body part is pronounced as one letter, but written with three, only two different letters are used?
Give it food and it will live, give it water and it will die.