Concept:Compost manure is formed by controlled decomposition of organic waste in pits.Explanation:Green manure consists of fresh green plants turned into the soil.Farmyard manure comes from animal dung, urine, and bedding material.Compost manure is produced when plant and animal wastes are decayed in pits.Inorganic manure refers to manufactured chemical fertilisers.Thus, the description matches compost manure.Answer:C. compost manure