In media res is when a character is dropped in the middle of action, and that being the beginning of the story. A flash forward is something that is shown in the story out of chronological order, usually for dramatic effect or irony. Episodic plot structures are much like TV show episodes, following a rising action-climax -rising action-climax pattern. I believe the answer you are looking for is Parallel Plot Structure. :)
I believe, from reading the book myself, reminds the reader about Stanley's grandfather and puts the reader into a perspective of which the reader is put into Stanley's shoes. Brainliest answer!
