Which pest control method involves utilizing barriers such as screens and netting?

The correct answer is the method that utilizes barriers such as screens and netting, which is known as mechanical barriers. This approach physically prevents pests from accessing certain areas, effectively blocking their entry and minimizing the potential for damage. Mechanical barriers are a non-chemical method of pest control and can be very effective in protecting crops, plants, and structures from various pests.

In contrast, resource management involves practices that optimize the use of resources to reduce pest populations, rather than employing physical barriers. Biological control relies on natural predators or parasites to manage pest populations, which does not involve the use of barriers. Chemical control utilizes pesticides to kill or manage pests, which again does not involve physical methods such as netting or screens. Thus, the approach involving barriers is distinctly categorized as mechanical barriers, making it the appropriate answer.