Concept:Shelter belts are rows of trees planted in coastal and dry regions to reduce wind speed and protect soil from erosion.Explanation:Shelter belts act as barriers against strong winds. They are planted along fence lines or field edges. Their main purpose is to shield crops and animals from cold winds and provide shade. They also help reduce wind erosion, especially in cultivated areas. By slowing down wind, they prevent topsoil from being blown away. This makes shelter belts a method of soil conservation. Other soil conservation methods include mulching, contour barriers, rock dams, terrace farming, intercropping, and contour ploughing.Answer:D. soil conservation