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In an area, natural increase is positive but the total population is decreasing. Which reason is most appropriate?

Answer and explanation

Correct answer: Out-migration is greater than the natural increase

The direct answer is B. Natural increase is births minus deaths. If it is positive, births are greater than deaths, so this factor alone would raise the population. Total population change, however, also includes migration. When more people leave than enter, out-migration is negative. If that loss is larger than the positive natural increase, the final total decreases. For example, a natural increase of 500 combined with an out-migration of 800 gives a total change of −300. B is correct because it explains how total decline can occur despite positive natural change. A would generally add people and increase the total. C contradicts the statement that natural increase is positive. D is impossible because the question describes a decrease. Memory cue: total change = natural increase + net migration.

Related tags

Natural IncreaseOut-MigrationTotal Population ChangePopulation GrowthPopulationGeographyClass 9 Mcq

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