Drip irrigation provides precise amounts of water directly to crop roots. this method is one of the mainstays of sustainable agriculture because it a. reduces soil erosion b. adds fertilizer to the soil c. encourages the growth of legumes d. aerates the soil

Drip method is one of the mainstays of sustainable agriculture because it : A. reduces soil erosion
Like the name said, Drip irrigation is designed to utilize the least amount of water supply by giving the water to the plant drip by drip. In this method, there is no flow of water that commonly caused the soil erosion (because the water flow cut out the soil little by little)

Your answer will be b action plan.