Final answer:
Todd's primary struggle is an internal conflict of self-confidence, exacerbated by the presence of an audience brought by Mr. Bixby. This conflict creates narrative tension and underlines the theme of self-reliance versus self-doubt in the passage.
Step-by-step explanation:
The main conflict Todd struggles with as he meets with Monique is internal. In the passage, Todd faces a loss of self-confidence as a result of external pressures—specifically, the additional people Mr. Bixby sends to watch him handle a boat crossing.
Initially confident in his abilities, Todd's assurance is shaken by the presence of others and their potential judgment. This evolving self-doubt relates directly to the theme suggesting the importance of relying on one's own knowledge and training rather than succumbing to second-guessing in the face of external pressures.
Conflict and Theme Development: This conflict engenders narrative tension and also serves to articulate Twain's message regarding self-reliance and the dangers of self-doubt. By understanding that the conflict is centered on Todd's internal struggle, we can see how the themes of confidence and self-reliance are highlighted in the narrative.