What Am I Riddles

Question: What goes up and down the stairs without moving?

Question: What lightens the light and darkens the dark?

Question: When my first is a task to a young girl of spirit,
And my second confines her to finish the piece,
How hard is her fate! But how great is her merit
If by taking my whole she effects her release!

Question: Whoever makes me can hear me, but nobody else can.

What am I?

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

What am I?