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In which condition can population decrease?

Answer and explanation

Correct answer: Deaths and out-migration are high

The direct answer is A. Population can decrease when removals are greater than additions. Deaths remove people from the population, and out-migration removes people from the area by sending them elsewhere. If these losses are high and are not balanced by births or in-migration, the total population falls. Option A is correct because it gives two forces that reduce population. Option B is wrong because births and in-migration add people and usually cause an increase. Option C is wrong because a birth rate higher than the death rate produces positive natural increase, at least before migration is considered. Option D is wrong because more in-migration than out-migration gives a positive migration balance and tends to increase population. The complete idea is: change = births + in-migration − deaths − out-migration. Memory cue: births and in-migration enter the plus side; deaths and out-migration enter the minus side.

Related tags

Population DecreaseOut-MigrationDeath RatePopulation BalancePopulation GrowthPopulationGeographyClass 9 Mcq

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