Answer:
What tree that definitely grows does not have a shadow and does not grow fruit?
What stays the same size no matter how much they weight?
So cold, damp and dark this place. To stay you would refrain, yet those who occupy this place do never complain.
I can move even when you are still. I can be one or many.
What can be swallowed, But can also swallow you?
What did the piece of wood say when he saw the screwdriver and screws approaching?