Question

reptiles are cold - blooded animals with scaly skin that live in many habitats, including deserts, forests, and wetlands. most reptiles lay eggs on land, and they look similar in body structure from hatchling to adult, though their size and color may change. their life stages are: egg, hatchling, juvenile, and adult. they breathe with lungs, not skin, and can eat plants, insects, or other animals. reptiles have unique adaptations like venom, color change, and hard shells, which help them survive. they play important roles in ecosystems as predators and prey, keeping nature in balance. what is one main characteristic of reptiles? choose the correct answer. they have moist skin. they are warm - blooded. they are cold - blooded.

Explanation:

The text clearly states that "Reptiles are cold - blooded animals". This is a well - known characteristic of reptiles. Reptiles do not have moist skin (amphibians do), and they are not warm - blooded.

Answer:

They are cold - blooded.