Answer:
relative location
Step-by-step explanation:
Relative location refers to the location of something according to the position of a landmark or other locations, so it always needs another place as a point of reference. In Matt's case, he uses the Dupont Circle as a reference.
The rest of the choices are incorrect because coordinates involve latitude and longitude position numbers that indicate absolute location; and lines of longitude are imaginary vertical lines called Meridians, which link points with the same longitude from the North to the South Poles.