What is population density? (PLATO) A. the total number of people living in a certain area
B. the average number of people in a given area
C. the rate at which the world’s population is expected to grown
D. the cultural or ethnic breakdown of people living in a country

Option A

Explanation:

Population density is a measurement of population per unit area, or exceptionally unit volume; it is a quantity of type number density. It is frequently applied to living organisms, most of the time to humans. It is a key geographical term. In simple terms, population density refers to the number of people living in an area per square kilometer.

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your answer is a. hope this : )