Which of the following is classified as a common sucking pest?

Aphids are classified as common sucking pests due to their feeding behavior. These small, soft-bodied insects feed by piercing the plant's tissue with their specialized mouthparts, known as stylets, and sucking out the plant's sap. This feeding not only reduces the overall vigor of the plant but can also lead to the transmission of various plant diseases.

In contrast, termites primarily consume wood and other cellulose materials, which makes them more related to structural damage rather than sucking on plant sap. Beetles have a different feeding strategy that often involves chewing, and while some types can be pests, they do not fall under the category of sucking pests. Centipedes are predatory and feed on other insects, also differing significantly from the category of pests that suck sap. Thus, the classification of aphids as common sucking pests is well-founded based on their behavior and impact on plants.