The operation or activity of two or more things at the same time or rate
Explanation:
It is in the introduction and then restated in the conclusion. Each supporting detail is then referred to in each of the body paragraphs one by one. The question is worded very oddly in my opinion so I would say introduction because it fits that answer best, but it could technically be all of them.
A. Yes, you must turn off the radio. / No, you need not turn off the radio.
B. Yes, he will come to the prize giving. / No, he won’t come to the prize giving.
C. Yes, they want a lift from us. / No, they don’t want a lift from us.
D. Yes, I can write a report for you. / No, I can’t write a report for you.
E. Yes, you should visit him in the hospital. / No, you shouldn’t visit him in the hospital.
Do you have a picture of the lines?