Which of the following can be a natural method of pest control?

Beneficial insects represent a natural method of pest control because they can help manage pest populations in an environmentally friendly way. These insects, often referred to as natural enemies, include predatory species such as ladybugs, lacewings, and certain parasitic wasps. They feed on harmful pests, thereby reducing their numbers without the need for synthetic pesticides. This method not only assists in keeping pest populations in check but also supports overall biodiversity in the ecosystem, promoting a healthier environment for plants and other wildlife.

In contrast, the use of chemical fungicides is not considered a natural method of pest control; these are synthetic chemicals designed to kill pathogens but can also affect beneficial organisms and the surrounding environment. Granular fertilizers, while important for plant health, do not directly address pest control. Regular mowing is a cultural practice that can help maintain the appearance and health of a lawn but does not inherently control pest populations. Each of these alternatives plays a role in lawn and ornamental care but does not serve the dual function of natural pest control like beneficial insects do.