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

Answer and explanation

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

Direct answer: B is correct. The death rate describes deaths in relation to a population, but a change in mortality can affect more than the total number of people. If people survive longer, life expectancy may rise and the proportion of older people can increase. This changes the age structure. It can also alter the dependent population: children and elderly people may depend more on working-age adults for support, while the size of each age group affects schools, healthcare, pensions, and employment planning. A is wrong because reducing deaths does not automatically increase the geographical area. C is wrong because births do not end when deaths fall. D is wrong because migration can continue independently. Memory cue: population change means not only how many people there are, but also who they are by age and dependency status.

Related tags

Death RateAge StructureDependencyLife ExpectancyPopulation GrowthPopulationGeographyClass 9 Mcq

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