Good Riddles

Question: What has one foot but not a single leg?

Question: I grow from trees and your home,
once I am grown I fall to my doom.

What am I?

Question: A young woman is attending her mother's funeral. While there, she meets a man she has never seen before and falls in love immediately. After the funeral she tries to find him but cannot. Several days later she kills her sister.

Why does she kill her sister?

Question: All things I devour: Birds, beasts, trees, flowers.
I gnaw iron, bite steel.
I grind hard stones to meal.

What am I?

Question: To give me to someone I don't belong to is cowardly, but to take me is noble.
I can be a game, but there are no winners.

What am I?