The figurative language is “like a ball”. It’s an simile since he’s comparing the fall to a rolling ball. Well he’s comparing the way he fell like an ball rolling down the stairs.
Theme-the subject of a talk, a piece of writing, a person's thoughts, or an exhibition; a topic.
(if this helps well its like the meaning about the story or the thing you know)
The answer isn’t in that file just so you know
Probably your thesis statement to make sure you havent strayed from your main theme
