What do we call the number of people living in a unit area of the earth's surface?

Population density

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Topography

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Population change

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Natural growth rate

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Solution

The correct option is A Population density
Population density is the number of people living in a unit area of the earth’s surface. It is normally expressed as per square km. The average density of population in the whole world is 51 persons per square km. South central Asia has the highest density of population.

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