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When can total population increase despite zero natural increase?

Answer and explanation

Correct answer: In-migration is greater than out-migration

The direct answer is A. Natural increase is births minus deaths. If births and deaths are equal, natural increase is zero. However, total population also changes through migration. When in-migration is greater than out-migration, more people enter the area than leave it, so net migration is positive. Total change can be written as natural increase + net migration. In this case it is 0 + a positive number, so the total population increases. B would produce negative net migration and reduce the population. C would leave both natural increase and net migration at zero, so there would be no change. D makes natural increase negative because deaths exceed births; unless positive migration offsets it, population would fall. A is therefore correct. Memory cue: zero births-minus-deaths does not mean zero total change; a positive migration balance can still add people.

Related tags

Zero Natural IncreasePositive Net MigrationTotal Population ChangeProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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