Which of the following is an example of foreshadow in To Kill a Mockingbird?

Early discussions Scout has with her father, Atticus, and her next-door neighbor Miss Maudie foreshadow major events in "To Kill a Mockingbird." Atticus says, "Shoot all the bluejays you want, if you can hit 'em, but remember it's a sin to kill a mockingbird." ... That's why it's a sin to kill a mockingbird."