Define 'biological control' in pest management.

Biological control is defined as the use of natural enemies, such as predators, parasitoids, or pathogens, to manage pest populations. This method leverages the natural ecological relationships that exist between organisms. For example, introducing a specific predator to control the population of a harmful insect species can lead to a reduction in the pest without relying on synthetic chemicals. This approach is advantageous as it often leads to sustainable pest management solutions that minimize negative impacts on the environment and human health.

Unlike other options, which involve direct intervention through human-made methods or manipulation of agricultural practices, biological control emphasizes working with nature's existing processes and dynamics. This strategy often results in a more balanced ecosystem, promoting long-term solutions to pest problems rather than relying solely on chemical inputs.