Final answer:
In the novel To Kill a Mockingbird, everyone in the balcony stands up when Atticus exits the courtroom as a sign of respect for his defense of Tom Robinson.
Step-by-step explanation:
In the novel To Kill a Mockingbird, when Atticus exits the courtroom, everyone in the balcony stands up as a sign of respect. This action is a display of honor and recognition for Atticus's integrity and courageous defense of Tom Robinson, an innocent black man accused of a crime. The people in the balcony, including the African American community, show their appreciation for Atticus's efforts to challenge racial prejudice and seek justice.