Which of the following is an example of a pesticide?

A rodenticide is an example of a pesticide because it is specifically designed to control or eliminate rodents, which are considered pests. Pesticides are substances used for preventing, destroying, repelling, or mitigating pests, and rodenticides fit this definition as they target a specific group of unwanted organisms.

In contrast, a fertilizer is primarily used to enhance the growth of plants and does not have pest control properties. A degreaser is formulated to remove grease and oil and is not intended for pest management. Similarly, a soil conditioner improves soil structure, fertility, and moisture retention but does not target pests. Therefore, the only option among the choices that functions as a pesticide is a rodenticide.