You could say that he appealed to pathos. It's an appeal to emotion while ethos is to credibility. He used pathos to speak about sad things like secession and about the evils of slavery and why it should end. He didn't have to appeal to credibility because he was already the president so everyone knew why he was competent.
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Answer:
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The correct answer is, True.
Reasoning behind this is because farmers needed new ways to make farming easier on them.
The answer is B. Most slaves were captured from other countries.