The correct option is A Cutting down the forest
During rains, some water is transpired by plants, some flows overland and collects in streams and some infiltrate into the pores or cracks of the soil and rocks. Plants in the above diagram, representing forest, helps to absorb the rainwater and percolate into the soil to form the ground water. If trees and forests are destroyed, there would be soil erosion and water would be muddy which would run down into various water reservoirs here lakes which would be folded with the gust of water.