Which approach focuses on preventing pests from entering buildings?

The approach that focuses on preventing pests from entering buildings is exclusion. This method involves implementing physical barriers or modifications to structures that limit access points for pests such as insects and rodents. Effective exclusion strategies might include sealing cracks and crevices in walls, installing screens over windows and vents, and ensuring doors close tightly. By preventing pests from entering, exclusion acts as the first line of defense, reducing the likelihood of infestations and the subsequent need for pest control measures.

Public education plays a role in raising awareness and teaching effective pest management practices but does not directly prevent pests from gaining access. Monitoring is essential for detecting pest presence and determining the need for intervention, while biocontrol involves using natural predators or parasites to manage pest populations rather than focusing on exclusion methods. Thus, exclusion specifically targets the prevention aspect of pest management, making it the correct answer.