What is the minimum size of an opening that permits rats to pass through?

Rats are remarkably agile and have flexible bodies, allowing them to squeeze through surprisingly small openings. The correct answer indicates that a rat can fit through an opening as small as 1/2 inch in diameter. This size is significant in pest management, as it highlights the need for thorough inspections and preventive measures to seal even small gaps in structures.

The other options suggest larger openings, which are less relevant regarding rats' ability to enter spaces. Understanding this threshold is essential for field representatives working to control rat populations effectively, as it informs how best to block potential entry points in residential and commercial settings.