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Which relation is most correct for actual population change?

Answer and explanation

Correct answer: (Births − Deaths + In-migration − Out-migration)

The direct answer is D. Actual population change combines natural change and net migration. Natural change is births minus deaths. Net migration is in-migration minus out-migration. Therefore the complete relation is: actual change = births − deaths + in-migration − out-migration. Births and arrivals are added because they bring people into the population of the area. Deaths and departures are subtracted because they reduce the number living there. Option A is wrong because deaths should be subtracted, not added. Option B is wrong because it leaves out deaths and uses births with the wrong sign. Option C is wrong because area and density describe population distribution or concentration, not the change in population caused by demographic flows. Option D is correct because every component has the proper sign. Memory cue: add arrivals, subtract departures; add births, subtract deaths.

Related tags

Actual Population ChangePopulation FormulaNet MigrationProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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