Answer:
Flashbacks can create mystery by revealing information that the reader or viewer did not previously know. By showing events from the past, the author or filmmaker can provide context that sheds new light on the present situation. Flashbacks can also create tension by showing events that have already happened, but that the characters are still dealing with in the present. For example, a flashback to a traumatic event can show the reader or viewer why a character is behaving a certain way in the present.