Answer:
Use me to reward good behavior.
As a stone inside a tree, Iβll help your words outlive thee. But if you push me as I stand, the more I move the less I am.
Teenage girls are pros at creating me. Learn me in classes.
Walk on the living, they donβt even mumble. Walk on the dead, they mutter and grumble. What are they?
I am rarely touched but often held. If you are smart you'll use me well. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?