Answer:
The rhetorical device used in the sentence is repetition.
Explanation
This refers to the art of using the same word over and over again in order to emphasize or drive home a point.
For example, to highlight the meaning of a word you have to highlight its meaning.
There are other forms of rhetorical devices that writers use. They are alliterations, allusions, amplification, etc.
Rhetorical devices are primarily used to persuade the reader and or to drive home a point.
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