Answer:
C. elevation
Explanation:
A physical map depicting when it shows how much above or below sea level a physical feature is an elevation.
Generally, elevations are represented on maps by lines of contour, which typically connect points having the same elevation. Also, elevations are shown on a physical map by using bands of color to connect points.
In Geography, elevations are represented or measured in feets or meters
Demographers study population: migration, birth and aging/death.
urban planners study land for environments for population to see if the land is good enough for a community to build on, that water is safe and the air is clean enough.
they find areas fit for neighborhoods to be built and or cities. make sure everything is safe and the fight size in land.