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Why can a sharp decline in death rate suddenly accelerate population growth?

Answer and explanation

Correct answer: Because more people survive when there are fewer deaths

Direct answer: A is correct. Natural increase is calculated by subtracting deaths from births. If the death rate falls sharply while the birth rate remains high or falls more slowly, the gap between births and deaths becomes larger. More children and adults survive, so the population can grow rapidly in a short period. This is why a decline in mortality may accelerate growth even without any rise in births. Option B is the opposite of the demographic relationship and is not caused automatically by fewer deaths. Option C is not a necessary result; out-migration may rise, fall or remain unchanged. Option D confuses population growth with area, which does not determine how many people are born or die. Memory cue: fewer deaths with births continuing means a wider birth–death gap and faster natural increase.

Related tags

Death RateMortality DeclineNatural IncreasePopulation GrowthProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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