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In which situation can the total population of a region decrease?

Answer and explanation

Correct answer: Deaths are high and out-migration is also high

Direct answer: D, because high deaths remove people from the population and high out-migration moves people away from the region. The basic relationship is population change = births − deaths + in-migration − out-migration. Thus, deaths and out-migration are both subtracting processes. If their combined effect is greater than the additions from births and in-migration, the total population decreases. Option A is wrong because both high births and in-migration add people. Option B is wrong because low deaths mean fewer people are lost, while high births add people. Option C is wrong because high births and inward migration both increase the number of residents. Option D correctly contains two processes that reduce population, so it gives the clearest situation for a decline. Memory cue: death and departure are two exits from the population.

Related tags

Population DecreaseDeathsOut-MigrationPopulation ProcessesProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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