Final answer:
The passage from Section 4 of 'The Gift of the Magi' illustrates the Youngs' poverty through the depiction of their rundown and broken letterbox and doorbell.
Step-by-step explanation:
From the underlined passage in Section 4 of The Gift of the Magi, the reader learns about the setting, which reflects the Youngs' financial hardship. Specifically, this passage suggests that the Youngs are poor because things like their letterbox and doorbell are rundown and broken, indicating a lack of resources to maintain their home. The condition of these items is emblematic of their overall economic situation, which impacts how they live and interact with their environment. O. Henry uses these details to highlight the modest means of the main characters, Jim and Della, underlining the themes of love, sacrifice, and the spirit of giving within the story.