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Why is it necessary to include migration while calculating actual population growth of an area?

Answer and explanation

Correct answer: Because people entering and leaving change the total number

Direct answer: A is correct. Actual population growth means the real change in the number of people living in an area. This change is not caused only by births and deaths. People may enter an area, called in-migration, or leave it, called out-migration. Therefore, a simple idea is: population change equals births plus people entering, minus deaths and people leaving. For example, if a town receives workers from other places, its population rises even if its birth rate does not change. If many residents leave, its population may fall. A is correct because both arrivals and departures alter the total number. B is wrong because migration changes the location of people, not the weather. C is wrong because migration directly changes population counts. D is wrong because migration occurs on land and across many regions, not only in seas. Memory cue: births and arrivals add people; deaths and departures subtract people.

Related tags

Actual GrowthMigrationTotal PopulationProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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