Answer:
I break down buildings, I crumble mountains but you can't see me. What am I?
I've got a beautiful beautiful hall all walled in red velvet with all white armchairs made of bone and in the middle a woman dances.
I help you carry your books.
I move without wings Between silken string I leave as you find My substance behind.
I am very afraid of doing scary activities.
What did the piece of wood say when he saw the screwdriver and screws approaching?