C. She explains that ocean temperatures cause drought, but human settlements make the problem worse.
Explanation:
This question refers to the text "A Dire Shortage of Water." In this text, the author explains the reasons why drought is an important problem, as well as the things that we can do to improve such a situation. She also talks about the causes, and while she acknowledges that ocean temperatures can play a role, she also states that humans are partly responsible for this:
<em>"Although ocean temperatures may be an important factor in starting a drought, people are making the problem of water shortages much worse."</em>
