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Why are river deltas in the Eastern Coastal Plain useful for farming?

Answer and explanation

Correct answer: They deposit fertile silt

Direct answer: D, they deposit fertile silt. A delta forms where a river enters quieter sea water and loses speed. The river then drops fine sediments, called silt, along with mineral nutrients. This creates broad, level and often fertile land suitable for crops, especially when water is available. A is wrong because completely rocky land is difficult to cultivate and is not the normal delta description. B is wrong because eastern Indian deltas are not covered by glaciers. C is wrong because a river delta is mainly made from river-borne sediment, not marine coral. D is correct because deposited alluvium renews soil fertility. Exam cue: slow river at its mouth means deposition, alluvium, delta and farming land.

Related tags

DeltaFertile SiltEastern Coast

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