In order to determine how many miles it is from a particular city on a map to the southern boundary of the united states, which map features would a student have to use?

For this particular item, we are asked to determine the map features that students should use should they want to determine the number of miles from a particular city on a map to the southern boundary of the United States. The answers are legend, scale, compass, and labels.

Southern secession is the event or issue that historians can gain insight from this excerpt.