Insects have which three major body parts?

Insects have which three major body parts?

• A. Head, Thorax, and Abdomen
• B. Antennae, Thorax, and Abdomen
• C. Head, Abdomen, and Thorax
• D. Thorax, Head, and Abdomen

Answer: (A)

Insects have three major body segments: head, thorax, and abdomen. The head houses sensory organs like eyes and antennae and contains the mouthparts. The thorax is where the legs and (in many insects) wings attach, while the abdomen contains most of the digestive and reproductive organs. The option that lists Head, Thorax, and Abdomen matches this standard three-part structure. The choice that includes antennae is not correct because antennae are appendages on the head, not a separate major body segment. The other two options just reorder the same three parts, but the conventional naming puts them in the order Head, Thorax, Abdomen.

Insects have three major body segments: head, thorax, and abdomen. The head houses sensory organs like eyes and antennae and contains the mouthparts. The thorax is where the legs and (in many insects) wings attach, while the abdomen contains most of the digestive and reproductive organs. The option that lists Head, Thorax, and Abdomen matches this standard three-part structure. The choice that includes antennae is not correct because antennae are appendages on the head, not a separate major body segment. The other two options just reorder the same three parts, but the conventional naming puts them in the order Head, Thorax, Abdomen.