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Which option gives the correct formula for population change?

Answer and explanation

Correct answer: Change = Births − Deaths + Net Migration

Direct answer: A. To find total population change, begin with the number of births because births add people. Subtract deaths because deaths reduce the population. Then add net migration, which may be positive when more people enter or negative when more people leave. Therefore, the correct formula is change = births − deaths + net migration. A is the only option that contains all three demographic processes in the correct relationship. B combines rainfall and soil, which are environmental factors and cannot calculate human population change. C compares a river with a mountain, which has no demographic meaning. D is an unrelated multiplication expression. Remember that natural increase is only births − deaths; adding net migration gives total population change.

Related tags

Population Change FormulaNatural IncreaseNet MigrationDemographyProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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