How can pest populations be effectively controlled using biological methods?

Biological methods for pest control focus on using natural processes and organisms to manage pest populations. Introducing natural enemies, such as predators, parasites, or pathogens that target specific pest species, is an effective strategy within this approach. These natural enemies can help maintain pest populations at acceptable levels without the need for chemical pesticides, thus promoting a more sustainable and environmentally friendly method of pest management. This method leverages ecological balance and encourages biodiversity, which can contribute to the overall health of the ecosystem.

While the other options may seem like potential methods of pest control, they do not align with the principles of biological pest management. Regularly applying chemical pesticides can lead to resistance in pest populations and negatively impact non-target organisms and the environment. Eliminating all wildlife in the area disrupts ecological balance and can lead to unintended consequences, such as the proliferation of certain pests. Exclusively using genetically modified crops may provide pest resistance but does not directly engage biological control methods and can also raise concerns about biodiversity and environmental impact. Thus, introducing natural enemies stands out as a holistic and effective method of controlling pest populations biologically.