Name a beneficial insect commonly used in biological pest control.

Ladybird beetles, commonly known as ladybugs, are widely recognized as beneficial insects in biological pest control. They are known for their voracious appetite for aphids and other soft-bodied pests, making them a crucial ally in maintaining healthy garden and agricultural ecosystems. By preying on these pests, ladybird beetles help reduce the population of harmful insects, thus minimizing the need for chemical pesticides and promoting a more sustainable approach to pest management. This natural form of control contributes to an ecological balance and supports the health of ornamental and turf areas.

While honeybees play an essential role in pollination and are beneficial for plant reproduction, they are not primarily pest controllers. Butterflies are also important in pollination, and while they are beautiful and contribute to biodiversity, they do not act as pest controllers. Grasshoppers, on the other hand, are typically considered pests themselves, as they can cause significant damage to vegetation and crops. Therefore, ladybird beetles stand out as the primary beneficial insect for biological pest management in the context of this question.