What indicates a possible rodent breeding site?

Open food containers are strong indicators of a possible rodent breeding site because they provide an easy and accessible food source for rodents. Rodents are attracted to areas where food is readily available, and if containers are left open, it not only invites them in but also creates an environment conducive to their breeding, as they have the necessary sustenance to thrive and reproduce. This aligns with pest management practices, as maintaining sealed food storage is crucial to discourage rodent infestations.

The other options do not indicate a rodent breeding site effectively. Clean surfaces imply good sanitation practices that help deter pests. Minimal human activity can sometimes present opportunities for rodents, but it does not directly point to breeding as there could be many factors at play. Pest control measures are proactive steps taken to eliminate or prevent rodent populations, thereby reducing, not indicating, breeding sites.