Which factor is least likely to be influenced by a writer's chosen genre?

The writer's personal experiences are least likely to be influenced by their chosen genre, as personal experiences are intrinsic to the individual and reflect their life, background, and worldview. Regardless of whether the writer is working in fiction, poetry, or non-fiction, their unique experiences form the foundation of their perspective and storytelling.

In contrast, the other factors—structure of the argument, vocabulary used, and number of characters—are all heavily shaped by the conventions and expectations of the chosen genre. For example, a persuasive essay requires a specific argumentative structure and formal vocabulary that may not apply to a narrative or poetic form, which could employ more creative language and character development. Thus, while a writer's personal experiences inform their work, they remain consistent regardless of genre, making them less susceptible to genre-related influence.