Solved UPSC CDS/OTA Question
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Q · Landformsmedium · 45s
What causes the formation of a waterfall?
TopicLandforms
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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Waterfalls form due to differential erosion where a river flows over rocks of varying resistance to erosion. The softer rock erodes more quickly than the harder rock above it, creating a step in the river bed. Over time, this step becomes more pronounced, eventually forming a waterfall as the water plunges over the resistant rock layer.
Final Answer: Option B - Differential erosion of rock layers