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Why is decadal change useful in studying population growth?

Answer and explanation

Correct answer: Because it shows population change over ten years

Correct answer: A. A decade is a period of ten years. Decadal change compares the population at two points separated by about ten years and shows how much the population has increased, decreased or changed during that period. This helps students and planners identify a longer-term population trend instead of judging growth from a single year. Population data collected through regular censuses or other surveys can be compared across decades, while the exact reference period depends on the data source. B, C and D are wrong because decadal population change is a demographic measure; it does not describe river direction, mountain colour or the taste of soil. Memory cue: decade means ten years, so decadal change means change over ten years.

Related tags

Decadal ChangePopulation TrendCensusPopulation GrowthPopulationGeographyClass 9 Mcq

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