Discussion
Given below are the two statements one labelled as Assertion (A) and other Labelled as Reason (R) :
Assertion (A) : The work of wind as an agent of gradation is not as widespread as that of water.
Reason (R) : It is effective only in the desert regions of the world where rainfall is scanty and soil particles are loose.
In the context of the above two statements which one of the following is correct :
Answer: A
Both (A) and (R) are true and (R) is the correct explanation of (A). Wind erodes, transports and deposits material, but its work is widespread only where there is little vegetation and loose dry sediment, which means desert regions with scanty rainfall. Running water acts nearly everywhere on land, so wind is less widespread as an agent of gradation.
Because (R) states exactly why wind is limited to such regions, it explains (A). Option B is wrong since (R) does explain (A); options C and D are wrong because both statements are true.
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