Correct option is A
The correct answer is (a).
Explanation
During summer, high temperatures cause water to evaporate rapidly from the soil surface and from plant leaves through transpiration. Due to this increased loss of water, fields require more frequent watering. Hence, both the assertion and the reason are true, and the reason correctly explains the assertion.
Additional Information
• Option {b} is incorrect because the reason clearly explains the assertion. • Option {c} is incorrect because the reason is scientifically correct. • Option {d} is incorrect because the assertion is also true.