2. Terraces are made on side of hills; (a) to make them look beautiful. (b) to prevent the soil from being blown away by winds (c) to increase the speed of the flowing water. (d) to decrease the speed of the flowing water.
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Terraces are made on side of hills (d) to decrease the speed of the flowing water. Terraces divide slopes in such a way that surface runoff is obstructed and carried to a protective outlet. They help in reducing water flow velocity, therefore, reducing soil erosion.
Terraces are made to decrease soil erosion from running water by reducing the slope length, reduncing the water flow velocity, and trapping the sediments to increase soil fertility. It helps to decrease water flow and prevention of soil erosion. Terraces are made by transforming long slopes into a series of smaller slopes.
To learn more about the process of terracing, refer to https://brainly.in/question/981820