Which method is most effective in the prevention of pests and insects?

Ensuring cleanliness both inside and out is the most effective method in the prevention of pests and insects because it addresses the root causes that attract them. Maintaining a clean environment eliminates food sources and breeding grounds for pests, which are often drawn to spills, crumbs, and waste. Regular cleaning reduces the chances of infestations and helps maintain a hygienic space that is less appealing to insects and rodents.

While other options like using pesticides, sealing food tightly, and installing traps can aid in pest management, they are more reactive measures. They can control existing pest problems but do not prevent new ones from occurring as effectively as a thorough cleanliness regimen does. Cleanliness not only deters pests but also promotes a healthier environment, which is crucial in food management settings.