Final answer:
The inclusion of events in locations like Philadelphia in a book focused on Isabel in New York enhances the narrative by providing context, historical verisimilitude, and a broader socio-political environment that shapes the story's characters and themes.
Step-by-step explanation:
The importance of mentioning events in locations like Philadelphia when the book mainly follows Isabel's life in New York is tied to the significance of setting in a narrative. The setting enriches the story by providing critical context that shapes characters and the overall narrative. In literature, the setting is not simply a backdrop, but it's fundamental to the development of the story's themes, conflicts, and characters.
By expanding the geographical scope, the author is able to illustrate the broader socio-political environment in which the characters, including Isabel, live their lives. This helps the reader understand the historical and cultural influences during the time period in which the story is set. It also allows the characters' personal stories to resonate more deeply, as they are interwoven with real-world events and locales, making the narrative more engaging and authentic.
The additional details about various events and locations help to create a sense of historical verisimilitude and remind the reader that the characters are part of a larger world where important events take shape beyond their immediate sight. This might also affect the characters indirectly and set the stage for the actions and decisions they will make within the narrative.