Answer: Terrace Farming is the best method to prevent soil erosion in an agricultural area. Thus, it is Option (D).
Explanation: Terrace farming refers to farming in which steeply sloped surface-like hills (higher altitudes) are cut into flat layers, resembling a series of steps on which various crops are grown. Rainfall takes soil with it, leading to erosion. Terrace farming mitigates the effects of erosion by slowing water runoff and trapping it in individual layers along the incline.
Slash-and-burn agriculture refers to the clearing of wild or forested land and the burning of any remaining vegetation. This deforestation causes the soil to erode since there is no vegetation left to hold it.
Integrated Pest Management (IPM) is a sustainable, science-based, decision-making process that combines biological, cultural, physical, and chemical tools to identify, manage and reduce risk from pests and pest management tools and strategies in a way that minimizes overall economic, health, and environmental risks.
Monocropping is the agricultural practice of growing a single crop year after year on the same land, in the absence of rotation through other crops, or growing multiple crops on the same land, which is known as polyculture.