What is a common feature of adult insects?

Adult insects have several defining characteristics that collectively distinguish them from other organisms, and among these, the presence of one or two pairs of wings and three pairs of legs is fundamental. Insects belong to the class Insecta, and a pivotal feature is their body plan, which typically includes three main segments: the head, thorax, and abdomen.

The thorax is equipped with three pairs of legs, one pair attached to each segment, which aids in mobility and adaptability to various environments. Furthermore, many insects have evolved to possess either one or two pairs of wings, which serve essential functions in locomotion, reproduction, and survival. This trait is critical as it allows insects to exploit different ecological niches effectively.

Considering these anatomical traits, the statement about having one or two pairs of wings and three pairs of legs accurately reflects the usual structure found in adult insects, thereby confirming its validity as the correct answer.