A&R - Desirable and undesirable changes — task. Science CBSE, Class 7 New.

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Study the following Assertion and Reason carefully and select the correct option:

1. Assertion (A): Milk changing into curd is a desirable change.

Reason (R): Curd is prepared with the help of beneficial bacteria.

Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

2. Assertion (A): Planting trees helps reduce soil erosion.

Reason (R): Tree roots hold the soil firmly and reduce the movement of soil by wind and water.

Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

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34. A&R - Desirable and undesirable changes

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