Read this excerpt from "herd about the flu."
herd about the flu
it's winter and the flu is raging. it's in your school, you know people who have caught it, and you are washing your hands for the fifth time. missing school because of flu might not sound so bad, but the flu is one of the worst viruses you can have. the chills, the fever, the severe aches in your legs and arms . . it's not something you want. your mom drives you to the drugstore and you see a sign: no flu shots available.
wait a minute—there is a bad flu this season. you need the shot.
where is the shot, and why can't you get it?
there are several answers to these questions. first, it just may not be ready. flu viruses change all of the time, so new flu vaccines must be produced every year, and they take months to develop in research labs.
what is the purpose of the lines that are underlined?

D. These are headings that give titles to the topics being discussed in the paragraphs after them.

Explanation:

Step 1.) Find the answers that you know can not be right or the ones that do not make sense, like option C. These are conclusions that summarize all of the information in the paragraphs before them. The paragraph before the underlined text, in the passage, talks about you going to school and getting the Flu and driving to the doctors. This does not explain the reason why the pharmacy is out of flu shots. Also you can eliminate option B. These are summary points so that the reader could just read these lines and understand the passage. The underlined text does not explain the paragraph before it or after it. So now you have eliminated half of the answer choices.

Step 2.) Read the passage over again, and look closely at the questions you have left. We now have options A. These are answers to topic questions, and the paragraphs after them explain the answers and D. These are headings that give titles to the topics being discussed in the paragraphs after them left. Now compare the 2 answer choices choice A. says that the underlined text are answers to topic questions, But the underlined text is a question not an answer and the paragraph after it is not explaining an answer it is the answer to the underlined question. So thus it must be answer D., but just to make sure we must look at it too. Choice D. says that the underlined text is a heading for the paragraph and the topics being discussed after it. The underlined text is asking a question and the paragraph after it is answering it so thus means that the answer is D.

Step 3.) Now that you have the answer you can go and answer your question, or if you already did then you can use these steps later on another question you are having trouble answering.

I hope this helps =3

I believe the answer is D: These are headings that give titles to the topics being discussed in the paragraphs after them.

Explanation:

tending to cause harm

i think the answer is d.