Hello. You did not provide the article to which this question refers, which makes it impossible for it to be answered accurately. However, I will try to help you in the best possible way.
It is only possible to know the central idea of an article by reading the article. Generally, this main idea is exposed in the first paragraphs, as it allows the reader to understand the subject that will be approached. This is because the central idea is the main subject to which the article wishes to discuss and argue. Therefore, to answer your question you will need to find this subject in the article.
Answer:
B. Does the narrator sound casual or formal?
Annihilate and decimate both mean to destroy something or someone, but annihilate means to destroy something as a whole, and at a bigger scale, while decimate doesn't have to mean destroying the whole thing.
Eradicate and massacre are both violent words with the intent to convey destruction, but eradicate is a more general term, as massacre is meant to simple destroy/kill a large group of people.
Writing forma English means that you use a wide variety of words.
And those words are some pretty smart words, not the usual ones that are used in everyday speech.
