Answer:
O B. By putting each action in order from least harmful to the environment to most harmful.
Explanation:
A chronological structure refers to the arrangements of events in the manner or order they occurred or happened. In other words, it means the ordering of events in a sequence, like from beginning to end without any to and fro movements.
In the back cover description, the author mentions how some normal acts of human beings are significant causes of the environment. And to convey the same information using a chronological structure, the author can put each action in the order from least harmful to most harmful, in an orderly manner.
Thus, the correct answer is option B.
