What literary devices are used in to kill a mockingbird chapter 30?

In Chapter 30 of "To Kill a Mockingbird," the author Harper Lee uses symbolism in the mockingbird to represent innocence and purity. She also employs foreshadowing when Scout realizes that Boo Radley has been watching over them, hinting at his role as their protector throughout the story. Additionally, Lee uses irony when Atticus tells Scout that exposing Boo Radley as a hero would be like killing a mockingbird, highlighting the theme of empathy and understanding.