Which statement is true about biological control methods?

Biological control methods are designed to manage pest populations by enhancing or introducing natural enemies of those pests. This approach utilizes living organisms, such as predators, parasites, or pathogens, that can naturally reduce pest numbers without the reliance on synthetic chemicals.

By promoting the presence of these natural antagonists, biological control can create a balanced ecosystem that allows for the suppression of pest populations over time. This method is often more sustainable and environmentally friendly compared to chemical pesticide applications, as it seeks to work with nature rather than against it.

Other options listed do not accurately reflect the principles of biological control. Relying solely on synthetic pesticides contradicts the fundamental concept of biological control, which aims to minimize or eliminate the need for chemicals. The notion that biological control can only be applied in greenhouse settings is also incorrect, as these methods can be used in various agricultural environments, including open fields and organic farms. Lastly, while some biological control agents may thrive better in humid conditions, many can operate effectively across a range of humidity levels, making high humidity a non-requirement for their effectiveness.