The lines are narrated in what is known as free indirect speech, or at times called free indirect discourse. This is because the style combines the elements of a third person narration with a first person to describe the character's thoughts, feelings, or emotions.
Answer:
Metaphor
<h2>What is a metaphor?</h2>
A figure of speech in which a term or phrase is applied to something to which it is not literally applicable in order to suggest a resemblance, as in "A mighty fortress is our God."
In the sentence, "My son is a greyhound out of the blocks when it's hometime," the son is being compared to this because of how fast he runs to get home.
Hence, the technique used in the phrase, "My son is a greyhound out of the blocks when it's hometime" is a metaphor.
When Percy was not at school, he lived with his Mother Sally Jackson and his step father; whom he called smelly gabe who treated him and his mom like trash.
Because it affects the climax