Question

which piece of text uses this meaning of content?
content noun the material contained within something
the content of a cover letter should be organized and concise; it shouldnt simply reiterate everything on your résumé.
several opinion polls reveal that voters are more content with the citys current mayor than they had been with the previous one.

Explanation:

We need to find the text where "content" means "the material contained within something". In the first sentence, "content of a cover letter" refers to the material (information) in the cover letter. The second sentence uses "content" as an adjective meaning satisfied, so it doesn't match.

Answer:

The content of a cover letter should be organized and concise; it shouldn't simply reiterate everything on your résumé.