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Why can a boundary change affect comparison of population change?

Answer and explanation

Correct answer: Because the base area and the population included in it may change

Direct answer: A, because the base area and the population included in it may change. Population figures are meaningful only when we know which geographical area they represent. If a boundary is redrawn, villages, towns, or people may be added to or removed from the area. A comparison between an old figure and a new figure may then show a difference caused by the changed territory rather than by births, deaths, or migration within the original area. Step by step: the boundary defines the area; the area defines which residents are counted; a boundary change alters the counted population; therefore the apparent population change may not be directly comparable. B is wrong because boundaries do not make birth rates zero. C is wrong because migration can continue even when boundaries change. D is wrong because the meaning of death rate remains unchanged, although its measured value may vary with the population covered. Memory cue: same population trend requires the same geographical base.

Related tags

Boundary ChangeTerritorial ComparabilityPopulation DataGeographyProcesses Of Population ChangePopulationClass 9 Mcq

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