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Why is the effect of a falling death rate not limited only to population size?

Answer and explanation

Correct answer: Because age structure and the dependent population can also change

Direct answer: Option A is correct. A falling death rate means that fewer people die during a given period, but its demographic effect is broader than simply adding people to the total population. Step one: survival improves and average life expectancy may rise. Step two: more people may live into older age groups, changing the age structure. Step three: the proportion and number of dependants may change, which can affect healthcare, pensions, family responsibilities, schools and the working population. The exact effect depends on births, migration and the ages at which deaths decline, but age structure is clearly important. Option B is wrong because death rate directly affects population change. Option C confuses a rate with physical area. Option D is wrong because population size and composition can change. Memory cue: demographic change concerns both how many people there are and what age groups they belong to.

Related tags

Death RateAge StructureDependencyProcesses Of Population ChangePopulationGeographyClass 9 Mcq

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