Which of the following describes the body structure of beetles?

The body structure of beetles is best described as hard and chitinous. Beetles, belonging to the order Coleoptera, are characterized by their tough exoskeleton, which is composed of chitin, a long-chain polymer that provides both strength and protection. This hard outer covering helps shield them from predators and environmental hazards, allowing them to adapt to a variety of habitats.

Beetles also possess a distinctive body plan with a hardened forewing known as elytra, which protects the more delicate hind wings and abdomen. This structural adaptation is unique among insects and contributes to their survival across diverse ecological niches. The hardness of their exoskeleton is a significant factor in their ability to thrive in many environments, making the description of their body structure as hard and chitinous both accurate and important in understanding their biology.