Question

which geographic feature is primarily responsible for the lowest population area shown on the map? a columbia river b pacific ocean c rocky mountains d mississippi river valley

Explanation:

The map shows the western U.S. with the lowest population area (under 2 people per sq mile) in the central region. The Rocky Mountains span this area, creating harsh terrain and climate unsuitable for dense settlement, unlike the Columbia River (supports agriculture), Pacific Ocean (coastal population centers), or Mississippi River Valley (fertile, populated).

Answer:

C. Rocky Mountains