Figure of speech a lot of times is after the word "like" and it is something that isn't actually happening, but used to compare to things. Her hair isn't actually a cascade of brown water. Similes and metaphors are figures of speech.
A pronoun is taking the place of a noun. Since you could replace a noun with it, like instead of "the book didnt move" it would be "it didnt move". While this is much less specific, it still counts as a pronoun.
