Which method is not an approved method for preventing rodents from entering a structure?

The method of building traps is not an approved technique for preventing rodents from entering a structure because it does not address the underlying issue of entry points. While traps can be used to capture and reduce rodent populations, they do not effectively seal any openings that rodents may exploit to gain access to a building.

In contrast, methods like caulking and the installation of strainer plates serve to block potential entry points, making it difficult for rodents to penetrate the structure. Caulking is specifically effective for sealing gaps and cracks in walls, foundations, and around pipes, thereby eliminating easy access routes. Strainer plates can prevent rodents from sneaking through openings in drains and vents. Lastly, meter box design can include features that secure the box and prevent rodents from entering through this common access point.

Using proactive sealing methods is crucial for rodent prevention because it focuses on stopping the problem at its source. Building traps alone, meanwhile, is a reactive measure that does not prevent future infestations.