An author might develop a key concept about the benefits of recycling:
- C. By providing information on the environmental impacts of recycling
When an author wants to write an essay that would be an expository one, then he would have to provide information about the topic at hand.
In this case, an author wants to discuss about the benefits of recycling, so he would have to:
- First introduce the concept of the essay
- Explain key concepts
- Tell his readers the dangers of not recycling
- FInally tell them the benefits they can get
- Give his conclusion.
Therefore, the correct answer is option C
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