Final answer:
The plot of a story drives character development by revealing traits and growth through characters' responses to challenges, such as Mr. Singh's composure or Trevor's arrogance, or a student's resilience against socioeconomic barriers.
Step-by-step explanation:
The plot of a story serves as a driving force for character development, providing context and challenge which reveal those characters' traits, responses, and transformations. In the provided scenarios, the actions and reactions of the characters to plot events shed light on their personalities. For instance, Mr. Singh's coolness under pressure is exemplified by his response to Trevor's behavior, indicating a poised character. Whereas, Trevor exemplifies arrogance through a rude answer, which shows his self-importance. The second scenario with the student portrays the struggle against socioeconomic barriers, demonstrating how external conflicts like familial and financial responsibilities can impact a student's educational journey, reflecting their resilience or challenges faced due to their social status.