Answer:
B. A comparison between a whirlpool and a black hole is being made.
Explanation:
In this text, the author explains how a whirlpool works. He uses the example of a fish in order to explain this mechanism to the reader. The author describes the way the fish would have to swim in order to resist the force of the whirlpool. The author then tells us that the mechanism the whirlpool uses is similar to that of a black hole. Therefore, the items being compared are a whirlpool and a black hole.
Ideas that are recurring themes in Poe's other works, such as isolation, inner turmoil, the fine line between dreams and reality, and whether or not that line is comforting or worthy of despair.
C is the correct answer because sentence A is not properly correct, and B is not properly correct.
Hope this helps!
D. Something that is needed