ANSWER: B. generate essay topics
If you are looking into magazines as a student, then normally you are just in the first step of your writing process. In this stage, you should still be on the process of finding what to write about, thus turning to the magazine as a resource. Therefore, you scan magazine images and articles to find some inspiration on what to write about.
We cant answer that because you never gave us the sentence (there is no sentence so i cant find the <span>pronoun used within the object of preposition) ?</span>