Answer: The topic sentence
Explanation: If the text is properly written, the topic sentence should either be at the beginning of the paragraph/text, or the end, if it is a short text; for things like the heading or title; words in special print; repeated words; things reiterated by pronouns; or ideas being suggested.
The use of rhetorical devices by the African-American Civil Rights leader was very effective and this is shown in his infamous speech, <em>I Have A Dream</em> as he makes use of repetitions and asks some pertinent questions to convince his audience.
His speech was both moving and very effective and this solidified him as a powerful orator.
<h3>What is Rhetorical Appeal?</h3>
This refers to the use of words to convince a person and also the literary devices that is used to convey this.
Hence, we can see that the use of repetition by Martin Luther King Jr was very effective as he repeats the words "I have a dream" as he talks about a free, equal, and just society where people are not judged by the color of their skin, but the content of their characters.
Read more about Martin Luther King here:
brainly.com/question/17746240
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The answer is the first one, you must always cite your sources, even if you have not directly quoted them. It also adds credibility to your work (this is not the only reason, it is merely an incentive)