Question

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: Wind is a climatic factor affecting soil erosion. Reason R: Wind characteristics influence raindrop velocities and angle of impact and effect soil erosion. In the light of the above statements, choose the most appropriate answer from the options given below
• Both A and R are correct and R is the correct explanation of A
• Both A and R are correct but R is NOT the correct explanation of A
• A is correct but R is not correct
• A is not correct but R is correct

• A. Both A and R are correct and R is the correct explanation of A
• B. Both A and R are correct but R is NOT the correct explanation of A
• C. A is correct but R is not correct
• D. A is not correct but R is correct

Hint:

Wind affects soil erosion by:
• Soil particle transport
• Splash erosion enhancement
• Changing raindrop impact angle Important wind erosion mechanisms: \[ \boxed{ \text{Suspension, Saltation, Surface creep} } \]

Answer 1

The Correct Option is A

Concept: Soil erosion is influenced by several climatic factors such as:
• Rainfall intensity
• Wind velocity
• Temperature
• Storm characteristics Wind directly causes:
• Wind erosion and indirectly influences:
• Raindrop impact
• Splash erosion
• Surface runoff behavior Thus wind plays an important role in soil erosion processes.

Step 1: Analyzing Assertion A. Assertion A states: \[ \text{“Wind is a climatic factor affecting soil erosion.”} \] This statement is correct. Wind affects soil erosion by:
• Detaching soil particles
• Transporting particles
• Increasing evaporation and soil dryness In arid and semi-arid regions, wind erosion becomes highly significant. Hence: \[ \boxed{\text{Assertion A is correct}} \]

Step 2: Analyzing Reason R. Reason R says: \[ \text{“Wind characteristics influence raindrop velocities and angle of impact and effect soil erosion.”} \] This statement is also correct. Strong winds modify:
• Raindrop trajectory
• Impact angle
• Kinetic energy distribution This increases splash erosion and detachment of soil particles. Thus: \[ \boxed{\text{Reason R is correct}} \]

Step 3: Checking whether Reason explains Assertion. The reason directly explains how wind contributes to erosion processes. Since wind affects raindrop impact and soil detachment, it indeed acts as a climatic factor affecting erosion. Therefore: \[ \boxed{ \text{Reason R correctly explains Assertion A} } \]

Step 4: Selecting the correct option. Since:
• Assertion A is correct
• Reason R is correct
• Reason explains Assertion Therefore: \[ \boxed{ (A)\ \text{Both A and R are correct and R is the correct explanation of A} } \] Final Conclusion: Wind is an important climatic factor affecting erosion because it alters raindrop impact characteristics and soil particle movement. Hence the correct answer is: \[ \boxed{ (A) } \]