The falling action is when Mum comes to pick them up. She takes Ada and Jamie back to London. Ada doesnt want to go back to London. Ada reluctently goes back to London.
One of the symbols is Butter. Butter represents Ada's happiness. One of the symbols is a clubfoot. It represents her weakness.
The resoulution I would say is when they go back to live with Susan. This is the resolution because it is one of the last major events in the book. I liked this moment because I didnt like the mom at all.