The technique involving crop rotation and biological controls is a core component of ecological pest management. This approach emphasizes sustainable practices that harmonize agricultural productivity with environmental health. Crop rotation is effective because it disrupts the life cycles of pests and diseases that may develop when the same crop is planted repeatedly. By alternating different crops in a field, the populations of specific pests that target a particular type of crop can be reduced, ultimately lowering their impact and the need for chemical interventions. Biological controls involve utilizing natural predators, parasites, or pathogens to manage pest populations. This can lead to a more balanced ecosystem, as it reduces reliance on synthetic pesticides and promotes the presence of beneficial organisms that can keep pest numbers in check naturally. By integrating these practices, farmers can achieve better yields while minimizing adverse effects on the environment, enhancing soil health, and maintaining biodiversity. This stands in contrast to the other options, which do not align with the principles of ecological pest management. The focus on chemical pesticide application alone does not consider ecological balance and sustainability. The limited use of fertilizers is more about nutrient management than pest control. Lastly, ignoring pest presence would likely exacerbate pest problems rather than managing them effectively. Thus, the selected option is the best representation of techniques used in ecological pest