Final answer:
Atticus urgently asks for Calpurnia during the Missionary Circle meeting due to the tragic news of Tom Robinson's death in 'To Kill a Mockingbird', highlighting the story's themes of racial injustice.
Step-by-step explanation:
The question pertains to a scene in To Kill a Mockingbird where Atticus Finch interrupts a Missionary Circle meeting asking for Calpurnia's assistance. This interruption is significant because it occurs during a critical moment in the plot. Calpurnia is needed to help deal with the news of Tom Robinson's death, which has just taken place. This event underscores the gravity of the situation and the impact of racial injustice in the novel, as Atticus must break the news to Tom Robinson's family and navigate the aftermath of this tragedy.