"A naked lightbulb hung from the ceiling, right next to three or four dangling spiral strips of flypaper so thick with flies that you couldn’t see the sticky yellow surface underneath. " The description of the room creates imagery for the readers.
" I hated Billy at that moment, I really did. I thought of telling him about binary numbers and the Glass Castle..."The use of alliteration is seen in the "t" sounds. The harshness of the "t" sound creates tone of intense feelings, such as anger.
"Mom looked pointedly at Dad and then back at me. She told me I should try to be nicer to Billy. “He doesn’t have all the advantages you kids do,” she said."The irony in this is that the same thing could have happened to their family if Rose Mary and Rex continued their way of parenting and living.