Summary of how an author uses figures of speech

An author uses figures to set the mood. How????? If there is an allegory there has to be some hint so the mood is suspicion or mysterious. Also when an author uses an apostrophe and he starts to talk with his dead mother you get the feeling of him being creepy. Also with imagery, as reader he will get more into it because he can feel it he can smell so it just as if he was ther. When in the book ENZO its kind of a personification because it gives human traits to a dog whereas in real life you don't know what your dog is thinking. With metaphor and simile it gives the readers a spark instead of just saying in a normal phrase.