Answer:
Explanation:
In this sense "area" refers to a geographical area in which people may or may not live; any "population" refers to the group of people living in a specific area. We might discuss the "population" of the "Los Angeles area," which refers to people living within the geographic boundaries of the City of Los Angeles.
"Urban" characterizes a given area where the land is thickly settled with human residents (as opposed to open, commercial or rural land). Most of the area within the boundaries of "Los Angeles" are "urban."
"Density" refers to "population density," defined as the number of people per square mile (or other measure of area); as an example we might refer to the population density of the City of Los Angeles, and that reasure might be in the area of "246,000 residents per square mile."