What is a notable characteristic of all snakes?

All snakes are characterized as cold-blooded animals, meaning their body temperature depends on the surrounding environment rather than being internally regulated. This characteristic is fundamental to understanding snake physiology and behavior. Cold-blooded, or ectothermic, creatures like snakes rely on external heat sources, such as sunlight or warm surfaces, to raise their body temperature and can seek shade or cool environments to lower it when necessary. This adaptability allows them to thrive in various habitats.

The concept of being cold-blooded distinguishes snakes from warm-blooded animals, which rely on metabolic processes to maintain a constant internal body temperature. Understanding this trait is essential, as it underpins many of their survival strategies, including hunting, digestion, and reproduction. The correct answer encapsulates this fundamental aspect of snake biology.