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Which is the correct formula of natural increase?

Answer and explanation

Correct answer: Natural increase = Births − Deaths

The correct answer is option B: natural increase = births − deaths. Natural increase means the change in population produced only by births and deaths during a period; migration is not included in this calculation. Solve it step by step: first find the number of births, then find the number of deaths, and subtract deaths from births. For example, if 800 babies are born and 500 people die, natural increase is 800 − 500 = 300 people. If deaths are greater than births, the result is negative, called natural decrease. A is wrong because migration is a separate component of population change. C is wrong because area is not a demographic event. D is wrong because rainfall and temperature are climatic measurements. Memory cue: births add, deaths subtract.

Related tags

Natural IncreaseFormulaPopulation ChangeProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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