The correct answer is D. Paradox.
Step-by-step explanation
A paradox is a term to refer to an idea logically contradictory or opposed to the general consideration of what is considered true. According to the above, the fragment is a paradox because the author refers to the boat as a "home". In addition, he expresses "Other places seem so crowded and suffocating, but a raft does not", which could be considered a logically contradictory idea because a raft is very small or suffocating in size. So the correct answer is D. Paradox.