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If an irrigation project succeeds in a dry area, what long-term effect may occur on local density?

Answer and explanation

Correct answer: Local density may rise because farming and settlement expand

Answer: A, local density may rise because farming and settlement expand. Successful irrigation can make water available for crops in an area that was previously limited by dryness. More reliable water may support cultivation, encourage farm-related work and attract or retain households. As more people settle in the area, population may increase while the physical area remains broadly the same, so population density can rise. A is correct because it describes a possible long-term link between improved environmental conditions, economic activity and settlement. The word “may” is important: the effect depends on employment, land ownership, transport, other services and whether people actually move or remain there. B is wrong because successful irrigation does not imply zero population. C is wrong because irrigation generally supports, rather than automatically removes, settlement. D is wrong because the area can still be measured. Memory cue: improved water availability can attract crops, work and people.

Related tags

IrrigationDry AreaLocal DensityPopulation DensityPopulationGeographyClass 9 Mcq

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