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Which option gives the correct meaning of decadal growth?

Answer and explanation

Correct answer: Population change over a period of ten years

Answer: A. The word “decadal” comes from “decade,” which means a period of ten years. Therefore, decadal population growth refers to the change in population measured over ten years. To study it, compare the population at the beginning of the decade with the population at its end; the result may be expressed as an absolute change or, when required, as a percentage. A is correct because it connects the term with both population and a ten-year period. B is wrong because rivers are unrelated to the population-growth measure. C is wrong because mountain height is a physical geography measurement, not a population change. D is wrong because crop colour has no connection with the definition. The term does not mean ten separate objects; it describes a time interval. Memory cue: decade = ten years, so decadal growth = population change in ten years.

Related tags

Decadal GrowthTen YearsPopulation ChangePopulation GrowthPopulationGeographyClass 9 Mcq

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