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If an area has low birth rate but high immigration, what can be the main cause of population increase?

Answer and explanation

Correct answer: Net migration

Correct answer: A, net migration. Population change is affected by births, deaths and migration. Net migration means the number of people entering an area minus the number leaving it. Here, the birth rate is low, so births are not the main reason for the increase. However, high immigration means many people are entering the area, which can raise its total population. B is incorrect because a higher death rate generally reduces population. C changes the size of land, not the number of people. D describes rainfall, not a direct component of population change. Memory cue: people entering minus people leaving is net migration; positive net migration can increase population even when births are few.

Related tags

ImmigrationNet MigrationPopulation GrowthPopulationGeographyClass 9 Mcq

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