Why do people become homeless?

What are the main reasons behind this problem.

Whats better? summer or winter?

I like both.

Do you ever wish there was an undo button in life?

If yes then what are the things you want to change in your life.

If you could become any movie character you want,who would it be?

I want to be Forest from the movie Forest Gump.

Which is better I.E.,Firefox,Chrome or Opera?

Exactly which will deliver better user experience.