The correct answer is option 3: organic fertilizers sustain soil productivity. This means that organic fertilizers are better than chemical fertilizers because they help maintain or improve the fertility of the soil over time. Organic fertilizers are made from natural sources, such as animal manure, compost, or plant residues. These organic materials contain essential nutrients required by plants, such as nitrogen, phosphorus, and potassium, as well as organic matter that improves soil structure and enhances its water-holding capacity.

On the other hand, chemical fertilizers are synthesized in a laboratory and typically contain concentrated amounts of specific nutrients. Although chemical fertilizers can provide immediate nutrition to plants, they don`t contribute to the long-term health and sustainability of the soil. In fact, excessive use of chemical fertilizers can eventually lead to soil degradation, nutrient imbalance, and reduced soil fertility. Therefore, organic fertilizers are preferred because they nourish the soil, promote a balanced ecosystem, and support sustainable agriculture practices.