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What is the main cause of delta formation?

Answer and explanation

Correct answer: Deposition of sediments by a river at its mouth

A delta forms at the mouth of a river when the river slows down and deposits the sand, silt, and other sediments it carries. Continued deposition builds a triangular or fan-shaped landform. Wave erosion removes material rather than depositing it, so option B is incorrect. Exam tip: deltas are more likely where deposition is high and tidal or wave action is relatively weak.

Related tags

Delta FormationRiver DepositionRiver MouthSedimentsPeninsular RiversThe Peninsular RiversDrainageGeography

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