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:
it does at only if u use it properly
Answer:
The kind of supporting material that Alisha uses in her introduction is a brief example
Explanation:
A brief example has as characteristic to be very precise and concise, it only explains a point that is being presented without adding much or any narrative to it, Alisha presents a short sentence to exemplify the question that opens the presentation as a supporting detail to her further analysis of how to overcome hard times.
D: His explanations depict him as a bit defensive.
I hope this helps.