The Indus plains of Pakistan developed from parent material carried down from the Himalayas by the Indus and its tributaries. What type of parent material is this?
Correct answer D. None of the above
Explanation
Sediment transported and deposited by rivers is alluvium. Till and moraine are glacial deposits and colluvium moves downslope under gravity, so none of the listed options describes the river-borne parent material of the Indus plains.
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