Answer:
By Moon or by Sun I shall be found. Yet I am undone if there's no light around.
I have keys but no locks. I have space but no room. You can enter but can't go outside. What am I?
What color can you eat?
Who is your mother's only sister's son's brother's aunt's daughter's sister's father?
Alone I am 24th with a friend I am 20. Another friend and I am unclean.
I'm the source of all emotion but I'm caged in a white prison.