Final answer:
The allusion to World War II in the excerpt from Autumn Street helps establish a mood of Terror and paranoia.
Step-by-step explanation:
The allusion to World War II in the excerpt from Autumn Street helps establish a mood of Terror and paranoia. The mention of war creates a sense of anxiety and fear among the characters and the reader. This is further emphasized by the description of the drums beating, patriotism, and the flags flashing, which evokes a feeling of heightened tension and danger.