Answer:
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 regularly change shape yet remain a sphere. I am always there but not often seen. What am I?
I make billions of dollars selling windows. Who am I?
I am a word. I become longer when the third letter is removed. What am I?
A thousand wheels, but move I do not. Call me what I am, call me a lot. What am I?
A little house full of meat, no door to go in and eat.