Which technique gives the reader information from the past to help explain a character’s actions and reactions in a narrative?

Flashbacks give the reader a flash back to a person's life so that the reader may understand why a character is doing something or feeling some way about something that's happening in a story.

b)and

is the answer.

its because you eat a lot of food and that can lead to many heath problems like diabetes or becoming very over weight and fat etc.