Sealing cracks and crevices and small openings in buildings is an example of which type of mechanical control method?

Sealing cracks and crevices and small openings in buildings is an example of exclusion, which is a mechanical control method aimed at preventing pests from entering an area. By blocking these potential entry points, you minimize the opportunities for pests to access structures and become problematic. This proactive approach helps to protect buildings from infestations, thus maintaining a healthier environment.

Other methods mentioned in the options, such as cultivation, are more focused on manipulating pest habitats or conditions in agricultural settings. Trapping involves capturing pests that are already present, while mulching is primarily used to manage soil and plant health rather than directly preventing pests from entering a building. Therefore, exclusion is the most appropriate term for the method of physically blocking access to pests through sealing.