Concept:Macronutrients are elements required by plants in relatively large amounts for growth.Explanation:Sulphur is one of the essential macronutrients. It is needed in larger quantities for protein synthesis and other plant functions.Copper, manganese, and zinc are micronutrients, as they are required only in trace amounts.Therefore, among the given options, sulphur is the macro-nutrient.Answer:D. Sulphur