What is the purpose of rhetoric in persuasive writing?

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Rhetoric is the study and art of writing and speaking persuasively. Its aim is to inform, educate, persuade or motivate specific audiences in specific situations.

To get the reader thinking about why this topic is important.

Explanation:

I could be wrong

the choice that is not a technique that you should use to come up with ideas for the topic of a research project is, writing about academic subjects that are not interesting to you. this does not belong to the techniques to come up with ideas because having no interest in a certain topic will lose your drive to come up with better ideas. it gives no room for improvement and acquiring of new ideas and information. 

explanation:

c. with one finger is the answer