Read this paragraph. The crumbling brick structure looked forlorn in the early morning light. Pedestrians walked briskly by, oblivious to its fate. A faded marquis by the roadside bore a graffiti greeting, and weeds sprouted in the neglected flower pots. The front doors, long closed to the public, were bound with a heavy chain, and the plate glass windows were obscured with cardboard. Nearby, construction workers rubbed their hands together to fight the chill. Their breath was visible in the air as they leaned against the wrecking ball, waiting. What do the descriptive details reveal? the people’s concern for the building
the building’s original purpose
the building’s state of disrepair
the personalities of the workers

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.

the development of trade during the middle age increased to the change given in the agriculture, which gave money, industry and markets a bigger importance in economy. the agriculture production was more than the consumption, which meant the creation of wider markets out of the areas. besides, with the end of multiple wars, the population increased and new trade routes were created.