What Am I Riddles

Question: You can only keep it once you give it to somebody.

What is it?

Question: If you throw me out of the window,
I'll leave a grieving wife.
Bring me back, but through a door,
You'll see someone giving life.

What am I?

Question: I smash but I never hurt you. Give me your unwanted items and I will eat them and take them so you can get more. Some people might not like me while others may but I still come around on certain days. What am I?

Question: When you stand up he sleeps When you sleep he stands Who is it?

Question: What Can Make Food But Not Eat?