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What is the main difference between natural change and migration-based change?

Answer and explanation

Correct answer: Natural change occurs through births and deaths, while migration-based change occurs through movement of people

The correct answer is A. Natural change is produced by births and deaths within a population: natural increase equals births minus deaths. Migration-based change is produced when people move into or out of a place. In-migration adds people to the destination, while out-migration removes people from the source. These components can work in opposite directions. For example, a place may have more deaths than births and therefore natural decrease, but its population may still rise if many migrants enter. Option A is correct because it clearly separates the two mechanisms. Option B is wrong because births and movement also affect population change. Option C is wrong because both concepts describe changes in human population. Option D is wrong because area is used in calculating density, not as the direct cause of natural change. The complete change can be written as births − deaths + in-migration − out-migration. Memory cue: natural means births and deaths; migration means movement across places.

Related tags

Natural ChangeMigration ChangeDifferenceProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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