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What is necessary to measure population growth?

Answer and explanation

Correct answer: Population at two different points in time

Direct answer: B, population at two different points in time. Growth is a change, so one population figure by itself cannot show whether the number has risen, fallen, or stayed the same. We need a starting figure and a later figure, such as populations recorded in two different census years. Comparing the later number with the earlier number reveals the direction and amount of change. Option B is correct. Option A is wrong because a single figure gives size at one time but no comparison. Option C is wrong because area alone cannot show population change; area is useful when calculating density with population. Option D is wrong because climate may influence settlement but is not the measurement of growth itself. Memory cue: to measure change, compare “before” with “after.” If the later population is higher, it increased; if lower, it declined.

Related tags

Population GrowthTime ComparisonCensus DataPopulation ChangePopulationGeographyClass 9 Mcq

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