I think its d but dont get mad if its wrong
In fiction, you would like to give variety to your word choices. In formal business or academic writing, You want to prevent ambiguity and so may use the same word again and again to make your meaning clear. For example "contract" might be used repeatedly rather than along with some synonyms for it.
Answer:
Hi, I think that sentence 1 expresses the main Idea of the paragraph.
<u><em>HOPE IT HELPS ... :)))</em></u>
Answer: Homologous
Explanation: Not sure, I just looked it up