Unclear question. However, I inferred you meant having a summary of the text.
<u>Explanation:</u>
When making a summary of a text It is important to note down the key information that is presented in the text.
Hence the summary of the text could read;
<em>"Even though many people think otherwise, the food reserve that is limited and vulnerable in the upper zone of the seas are been consumed rapidly by humans today."</em>
<em />
The answer is: [C]: "exposition" .
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