Which of the following is a method for controlling pest populations in a safe manner?

Biological control is a method that involves using natural predators, parasites, or diseases to manage pest populations effectively and safely. This approach takes advantage of the existing ecosystem, promoting the natural balance of species. By introducing or conserving natural enemies of pests, biological control can reduce pest populations without relying heavily on synthetic chemicals, making it safer for the environment, non-target species, and human health.

This method is particularly advantageous because it can lead to long-term pest management solutions and often requires less intervention over time compared to other methods. By fostering this natural predation and parasitism, biological control not only helps in controlling pest populations but also enhances biodiversity and supports ecosystem health.

In contrast, other methods like trapping with poisons, heavy chemical use, and fumigation can introduce risks, such as the potential for toxicity to humans and non-target organisms, environmental contamination, and the development of pesticide-resistant pest populations. These alternatives often rely on more harmful chemicals, which can lead to unintended consequences in ecosystems.