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If both birth rate and death rate decline what is necessary to understand population change?

Answer and explanation

Correct answer: The gap between both rates

Direct answer: A, the gap between both rates. Natural increase depends on the difference between the birth rate and the death rate, not on either rate viewed alone. Both rates may fall, yet population can still have a positive natural increase if the birth rate remains higher than the death rate. For example, a fall from 30 to 20 births and from 15 to 10 deaths leaves a difference of 10, so the natural increase remains positive. A is correct. B is wrong because naming one rate gives no comparison. C and D are wrong because soil texture and boundary size do not determine natural increase. Also remember that migration must be added separately when calculating total population change.

Related tags

Birth RateDeath RateGapNatural IncreaseProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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