Question

which part of the rhetorical triangle would a speech on the estimated use of nuclear power in the next two decades most likely appeal to?
ethos
pathos
logos

Explanation:

The rhetorical triangle consists of ethos (credibility), pathos (emotion), and logos (logic/reason). A speech on the estimated use of nuclear power in the next two decades would rely on data, facts, and logical projections. Logos is about using rational arguments, evidence, and logical structure. Estimated use implies analysis of trends, technical data, and logical deductions about future scenarios, which are elements of logos. Ethos would be about the speaker's credibility (not the focus here), and pathos about emotional appeal (less relevant for a factual, estimated - use topic).

Answer:

logos