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To know population growth population of which two times is compared?

Answer and explanation

Correct answer: Initial and later period

The correct answer is A: compare the population in an initial period with the population in a later period. A change cannot be identified from only one population figure. First record the earlier or starting population, then record the population after a defined interval, and compare the two values. If the later value is higher, the population has grown; if it is lower, it has declined. Option A gives the required pair of time points. Option B concerns one day’s rainfall and says nothing about population. Option C measures the height of one mountain, not people. Option D is only a river’s name and contains no population data. The interval may be a year, decade or another stated period, but both observations must refer to comparable areas. Memory cue: growth needs “before” and “after.”

Related tags

Time PeriodPopulation ComparisonGrowthPopulation GrowthPopulationGeographyClass 9 Mcq

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