In The Adventures of Huckleberry Finn, 13-year-old Huck runs away
from home and soon meets up with Jim, an escaped slave who is
trying to get to freedom. Together, Huck and Jim travel down the
Mississippi River on a raft, meeting new people, seeing sights, and
facing danger together. As their journey nears its end and Jim comes
close to being captured and made a slave again, Huck realizes that
what is just an adventure for him is deadly serious for his friend.
Based on this synopsis, which statement best explains how the setting
affects the plot of The Adventures of Huckleberry Finn?