Final answer:
Parallelism is the key technique used by authors to make sentences memorable.
Explanation:
Parallelism is the technique that an author would be most likely to use to make sentences memorable. It involves the repetition of sentence structures, which can help in emphasizing main ideas and creating a rhythmic effect in the writing.
Learn more about Rhetorical techniques here:
https://brainly.com/question/30124000
