Thoreau's excerpt primarily uses Logos to logically argue that the government does not contribute positively to society by only stepping aside for progress. While Parallelism is also present, it serves as a stylistic device rather than the core argument. Therefore, the correct answer is A. Logos.
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In Thoreau's excerpt, the rhetorical device primarily used is Logos , emphasizing logical reasoning about the government's role. While Parallelism could be noted, the focus is on presenting an argument logically. Thus, the correct answer is A. Logos . ;