How does the poet develop the theme?
A
by telling about the speaker's history of seeing Imaginary things and then
expressing sadness that the speaker cannot see reality
by contrasting the happiness the speaker feels in the beginning while fishing
with the anger he feels after becoming an old man who no longer fishes
by explaining the steps the speaker takes to catch the trout and then describing
the process by which it transforms into a mysterious being
D
by describing the speaker's fateful meeting with a mysterious being and then
explaining his plans to continue to follow the being

that there are poor conditions

why does the crew join ahab's quest without hesitation?

i feel like it is actually b.

the purpose of the heading in the passage is to identify who is telling the story.

this excerpt is part of the book sugar changed the world (2010) written by marc aronson and marina budhos. as the book has been written by two people, the heading "marc" indicates that this specific excerpt is being narrated by aronson. in the fragment, marc describes his grandfather's story after hearing it from his cousin. however, there are other excerpts where budhos is the one that tells the story of her family.

aronson and budhos, who are husband and wife in real life, decided to write sugar changed the world when they found out how sugar, which had an important role in slavery and economy, changed their ancestors' lives.