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Why are floodplains considered both fertile and risky?

Answer and explanation

Correct answer: Because floods deposit sediment but can also cause waterlogging and damage

Direct answer: Option C, floods deposit sediment but can also cause waterlogging and damage. Floodplains are low, flat areas beside rivers. During a flood, flowing water spreads fine alluvial silt over these areas. This can renew soil nutrients and make farming productive. However, the same water can remain for a long time, waterlog fields, damage houses and roads, destroy crops, and threaten lives. C is correct because it includes both the benefit and the danger. A is wrong because floodplains are not made only of stones. B is wrong because rivers can overflow onto them. D is wrong because floodplains are not always below the sea. Exam cue: floodplain means fertile alluvial land together with flood risk.

Related tags

FloodplainFertilityFlood Risk

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