I believe it’s deferential
engages the reader
teaches the reader something useful (a new way of thinking about the essay in question)
helps the reader to see the bigger picture that the summarized essay is a part of, and
helps you as the writer to gain a deeper understanding of the issues and arguments of the essay being summarized.
Answer:
C: to provide a visual for something that the reader may be unfamiliar with
Explanation:
(don't quote me)
It seems that you have missed the necessary options for us to answer this question, so I had to look for it. Anyway, based on the given lines above, the literary device that Sophocles uses in these lines to keep the audience interested is DRAMATIC IRONY. Hope this helps.