Which of the following is an example of non-invasive vermin control?

The choice of using traps or sticky boards as a method of non-invasive vermin control is accurate because these methods can effectively capture pests without causing them harm that impedes the overall biological integrity of the environment. This approach facilitates the humane management of rodent populations, allowing for either relocation or disposal without the use of toxic substances or harmful chemicals.

In this context, selecting traps or sticky boards aligns with humane practices in research facilities and laboratories, where minimizing distress to animals is essential. It encapsulates the principle of reducing animal suffering while managing unwanted vermin populations effectively.

The other methods listed involve significant harm or distress to the animals. Poisoning wild rodents can cause substantial suffering and also poses risks to non-target species and the ecosystem. Ultrasonic devices, while marketed as non-lethal, lack consistent scientific backing showing they are effective at controlling rodent populations. Similarly, chemical sprays can directly harm not only the targeted vermin but also other wildlife and the environment, making them less desirable in settings that value humane and non-invasive techniques.