Read the excerpt from The Odyssey. Here are the means I thought would serve my turn:

a club, or staff, lay there along the fold—
an olive tree, felled green and left to season
for Cyclops' hand. And it was like a mast
a lugger of twenty oars, broad in the beam—
a deep-sea-going craft—might carry:
so long, so big around, it seemed.

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.

apprenticeships are formal, paid, long-term training programs that provide valuable classroom instruction coupled with on-the-job training for skilled, high-paying jobs.

the underline word is basically like a prepositional phrase.