Question

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11. Assertion (A): Erosion is the most dominant action of river in the upper course.
Reason (R): The rivers flow with great velocity in the steep gradients.
a) Assertion is correct. Reason is incorrect.
b) Assertion and reason both are correct. R explains A.
c) Assertion is incorrect. Reason is correct.
d) Assertion and reason both are correct. R doesn't explain A.​

Answer 1

Answer:

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Answer 2

Answer:d) Assertion and reason both are correct. R doesn't explain A.​

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Explanation:

A): Erosion is the most dominant action of river in the upper course. < Correct

(R): The rivers flow with great velocity in the steep gradients < Correct

Now : upper course has High gradient and high velocity BUT velocity is Cause of erosion is not obvious