The answer correct answer is b
Would it not be a coral reaf? Home to hundreds of fish and under water plants?
"I take the theme of 'Eveline' to be one of Joyce's key preoccupations, the idea of paralysis, our inability to break out of situations that have become home for us, even when those situations are unpleasant or worse. Most of the story is taken up with Eveline's reflections and her attempts to balance her decision"
I hope this was helpful!
Present tense is the best choice to describe an ongoing action when another one occurs