Why do interlocking spurs occur with V-shaped valleys in the upper river course?
Answer and explanation
Correct answer: The river cannot laterally cut resistant rocks much and bends around them
The governing concept is youthful river erosion in a steep upper course. Vertical or downward erosion is stronger than lateral erosion, so the river cuts a narrow V-shaped valley. Resistant projecting ridges cannot be removed quickly by sideways erosion; the channel therefore bends around them, making alternating spurs appear to interlock across the valley. Option A is correct. Sea waves, wind solution, and glacial delta formation involve different agents and do not explain this fluvial pattern.
Frequently asked questions
What is the correct answer to this question?
The river cannot laterally cut resistant rocks much and bends around them
Why is this the correct answer?
The governing concept is youthful river erosion in a steep upper course. Vertical or downward erosion is stronger than lateral erosion, so the river cuts a narrow V-shaped valley. Resistant projecting ridges cannot be removed quickly by sideways erosion; the channel therefore bends around them, making alternating spurs appear to interlock across the valley. Option A is correct. Sea waves, wind solution, and glacial delta formation involve different agents and do not explain this fluvial pattern.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
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