"I" is the one word among the following choices given in the question that represents the <span>subject of this sentence. The correct option among all the options that are given in the question is the fourth option or option "d". I hope that this is the answer that has actually come to your desired help.</span>
Answer:
the rise of sea levels in coastal areas
Explanation:
Most probably it's option A, because it sets the environment scary, and what all needed to make the story scary is environment & dialogues
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