c. natural gas
a renewable resource is a substance of economic value which can be replenished or replaced either through natural recurring processes or biological reproduction.
contour farming and reducing tillage are two practices that can reduce erosion.
contour farming - it creates reservoirs to collect rainwater and reduces soil erosion reducing tillage - allows crops to remain in the soil as to reduce soil erosion; no tilling means no interruption to the soil structure
answer; ///i do believe that the correct answer is (c) hold atoms together to form compound; //////////