Which is the best explanation of how the setting helps to reveal the theme

The theme of a work of art or literature can be more subtle than its subject. The subject is the main topic, while a theme may have deeper undercurrents or be unspoken. The setting is the time and place where the piece is set. It is the culture and society that shapes the story.

Explanation:

answer is above

the following what exactly?

showing or having an insensitive and cruel disregard for others. (so basically being heartless)

hope this : )