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If natural increase is positive but total population is decreasing, what is the strongest explanation?

Answer and explanation

Correct answer: बाह्य प्रवास प्राकृतिक वृद्धि से अधिक है

The direct answer is B. Natural increase is calculated from births minus deaths. It can be positive when births exceed deaths. However, actual population change also includes migration. A useful relation is actual change = natural increase + in-migration − out-migration. If out-migration is larger than the positive natural increase, more people leave than are added by births after deaths are considered, so the total population decreases. Option B is correct because it provides exactly this balancing explanation. Option A is wrong because in-migration adds people and would generally strengthen, not offset, a positive natural increase. Option C is wrong because a positive natural increase requires births to exceed deaths; it does not mean the birth rate is zero. Option D is wrong because deaths are part of the calculation of natural increase and therefore do have an effect. The important distinction is between natural increase and actual population change. Memory cue: births minus deaths describe natural increase; add arrivals and subtract departures to find the broader population change.

Related tags

Natural IncreaseOut-MigrationActual Population ChangeMigrationPopulation GrowthPopulationGeographyClass 9 Mcq

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