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A sudden convex break in a river long profile may strongly indicate which process?

Answer and explanation

Correct answer: River rejuvenation and retreat of a knickpoint

A sharp break or convexity in a river’s longitudinal profile is a knickpoint, where channel gradient changes abruptly. It can develop after uplift, a fall in base level, or renewed erosional power; the knickpoint then migrates upstream. Thus option A correctly links the profile break with rejuvenation and knickpoint retreat. The other choices describe coastal, karst, or aeolian processes.

Related tags

River ProfileKnickpointRejuvenationIntroduction And ConceptsBills Of ExchangeAccountancyClass 11 Mcq

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