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In which situation can total population decrease even when natural increase is positive?

Answer and explanation

Correct answer: Out-migration is greater than the positive natural increase

Direct answer: Option C is correct. Natural increase means births minus deaths. It is positive when births are greater than deaths. However, total population also depends on migration. The complete relationship is total change = natural increase + in-migration − out-migration. Suppose natural increase is +200, but 500 more people leave than enter. The total change is 200 − 500 = −300, so the population decreases. Option A is wrong because high in-migration adds people and normally increases total population. Option B describes a negative natural increase, not a case in which natural increase is positive. Option D is wrong because with no migration, a positive natural increase would make the population rise, not fall. The important distinction is between natural increase and actual or total population change. A positive birth-death balance cannot prevent decline if outward movement is larger.

Related tags

Natural IncreaseOut-MigrationTotal PopulationProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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