Correct option is D
✅ (d) All above: • Organic farming emphasizes the use of natural inputs and processes to maintain soil fertility and ecological balance. • Organic manure (e.g., compost, farmyard manure) enriches the soil with nutrients and improves its structure. • Bio-fertilizers (e.g., Rhizobium, Azotobacter) enhance nutrient availability by fixing atmospheric nitrogen and solubilizing phosphorus. • Bio-pesticides (e.g., neem-based products, Trichoderma) help manage pests and diseases without harming beneficial organisms. • Together, these components promote sustainable agriculture and reduce reliance on chemical inputs.