Concept:Arthropods like insects have a thorax divided into three segments, and different segments bear different appendages.
Explanation:The thorax of an insect consists of the prothorax, mesothorax, and metathorax.
The prothorax is the first segment of the thorax.
The prothorax bears only the first pair of legs and does not bear any wings.
The mesothorax bears the second pair of legs and the first pair of wings.
The metathorax bears the third pair of legs and the second pair of wings.
So, among the given statements, only the prothorax is correctly described as bearing legs alone.
Answer:A. Prothorax bears only legs