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Why is old population useful in understanding population growth?

Answer and explanation

Correct answer: To compare with the new population

Direct answer: A is correct because population growth is understood by comparing the earlier population with the later population. First identify the old or base population and then identify the new population. The difference between them shows the absolute increase or decrease; if needed, the percentage growth is calculated by dividing the change by the old population and multiplying by 100. Thus, the old population provides the starting point for a fair comparison. A is correct because it describes this comparison. B is wrong because weather is studied with atmospheric measurements, not population figures. C is wrong because river flow is related to drainage, slope and water conditions. D is wrong because soil colour is a soil characteristic and has no role in measuring population growth. Memory cue: growth always needs a starting value—compare old with new.

Related tags

Population GrowthBase PopulationComparisonPopulationGeographyClass 9 Mcq

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