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In which situation is it necessary to study migration separately to understand population change?

Answer and explanation

Correct answer: When births and deaths are equal but people are coming from outside

Correct answer: A. Migration must be examined separately when births and deaths are equal but people are entering from outside. If births equal deaths, the natural increase is zero because births minus deaths equals zero. However, in-migration still adds people to the region, so the total population can rise. This shows why total population change includes both natural change and migration. Option A is correct because it describes a case where births and deaths alone would suggest no change, while migration produces an actual increase. Option B is wrong because if nobody changes place, there is no migration to study. Option C is wrong because a change in weather does not by itself describe population movement. Option D is meaningless: area and population are different measurements. Memory cue: natural change equals births minus deaths; total change must also consider people entering and leaving.

Related tags

MigrationTotal Population ChangeNatural IncreaseBirths And DeathsProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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