What action is most effective in preventing pest infestations?

Sealing cracks and crevices is the most effective action in preventing pest infestations because it addresses the entry points that pests use to gain access to a space. Many common pests, such as rodents and insects, can exploit even the smallest openings in walls, floors, and around utility lines. By sealing these gaps, you create a barrier that helps keep pests out before they can invade, establish a presence, or reproduce within the area.

While using pesticides, proper food storage, and spraying air fresheners may have some roles in pest management, they do not inherently prevent pests from entering a space. Pesticides may only address existing infestations rather than stop new ones from occurring. Proper food storage helps mitigate food sources that attract pests but does not stop them from accessing the area. Air fresheners are designed to mask odors, not to deter pests. Therefore, sealing cracks and crevices stands out as a proactive and preventive measure against pest problems.