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What is the higher-level reason for the island-forming and wide nature of Brahmaputra in Assam?

Answer and explanation

Correct answer: Combined effect of high discharge high sediment and low plain slope

Direct answer: A, the combined effect of high discharge, high sediment load, and low plain slope. In Assam, the Brahmaputra carries a very large volume of water and much sediment from its mountainous catchment. When it reaches the relatively gentle plains, its flow spreads, divides into channels, and deposits sediment. Channels may shift, floodplains widen, and river islands can form, such as Majuli in the Brahmaputra system. Option A is correct because all three factors work together. Option B is wrong because desert sand alone does not explain the river’s behaviour. Option C is wrong because volcanic lava is not the main material involved. Option D is wrong because the Brahmaputra does not completely dry up in Assam. Memory cue: Brahmaputra in Assam means much water, much silt, little slope, and shifting channels.

Related tags

BrahmaputraAssamRiver Islands

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