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If birth rate is falling but death rate is falling even faster, how can initial population growth remain?

Answer and explanation

Correct answer: It can remain positive and rapid

Answer: A. Natural population growth depends on the difference between the birth rate and the death rate, not on whether each rate is individually rising or falling. For example, if the birth rate falls from 30 to 25 per thousand while the death rate falls from 20 to 10 per thousand, the gap changes from 10 to 15 per thousand. Both rates declined, but the birth rate is still much higher, so natural increase becomes larger. The exact result depends on the actual values and the time period, but a faster fall in death rate can keep growth positive and may make it rapid. B is wrong because falling rates do not automatically make growth negative. C is wrong because equal rates, not merely falling rates, would be needed for zero natural increase. D is wrong because total growth can also be affected by migration. Memory cue: compare the gap, not just the direction of each rate.

Related tags

Birth RateDeath RateNatural IncreaseGrowth GapPopulation GrowthPopulationGeographyClass 9 Mcq

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