Physiological density measures: A. the number of people per arable square mile.
Population density can be defined as the total number of persons (people) that are living in a population per unit area.
Mathematically, population density can be calculated by using this formula:
Population density = Population size/land area
Physiological density can be defined as a measure of the total number of people per the total amount of farmable land (arable square mile).
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