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Why can migration cause a sudden change in population growth?

Answer and explanation

Correct answer: Because people can enter or leave an area in large numbers in a short time.

The correct answer is A. Migration is the movement of people from one place to another. In-migration adds people to the destination area, while out-migration removes people from the origin area. Unlike births and deaths, which are spread over time, a migration event can bring or remove many people within a relatively short period. This can suddenly change the population size and create new demands for housing, transport, schools, jobs and health services. A is correct because it describes the direct numerical effect of migration. B is wrong because migration does not automatically stop births. C is wrong because the death rate may change and its constancy is not the reason migration has a quick effect. D is wrong because migration does not make climate disappear. Also remember that migration changes total population, not natural increase, which is based only on births and deaths. Memory cue: arrivals add and departures subtract quickly.

Related tags

MigrationPopulation ChangeRegional GrowthPopulation GrowthPopulationGeographyClass 9 Mcq

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