Final answer:
Gatsby claims he is the son of wealthy Midwesterners who have passed away, reflecting themes of self-made wealth and the American Dream in Fitzgerald's work.
Step-by-step explanation:
In F. Scott Fitzgerald's narrative, Gatsby explains his background to Nick, claiming to be the son of wealthy Midwesterners, but later admitting that his family has passed away. This detail is significant in understanding Gatsby's character and the theme of American Exceptionalism represented in the novel.
The story of self-made wealth and social mobility reflects a broader cultural narrative common in the United States during the period, such as the ones depicted in Horatio Alger's novels and the experiences of many American families. Gatsby's attempts to recreate his identity and rise in social status reveal the complexities and illusions of the American Dream during the Jazz Age.
Based on the given information, it is not explicitly mentioned how Gatsby's family has changed or what happened to them. However, it is implied that his family's wealth and status may have been lost or diminished over time.