Which of the following insects is commonly a pest in gardens?

The choice of aphids as a common pest in gardens is accurate because aphids are known for their ability to reproduce quickly and in large numbers, often leading to significant damage to plants. These small, soft-bodied insects typically feed on the sap of plants, which can weaken and even kill them if infestations are severe. They are particularly problematic because they can transmit various plant viruses and can produce sticky honeydew, which encourages the growth of sooty mold.

In contrast, ladybugs and honeybees play beneficial roles in gardens. Ladybugs are natural predators of aphids and other pests, helping to control their populations. Honeybees are vital pollinators that aid in the reproduction of many flowering plants, contributing positively to the ecosystem. Butterflies, while aesthetically pleasing and important for pollination, do not negatively impact plants in the way that aphids do. Thus, among the choices presented, aphids are clearly identified as the typical garden pest.