These cannot make their own heat so they depend on their environment to regulate their body temperature.

These cannot make their own heat so they depend on their environment to regulate their body temperature.

• A. Warm-blooded
• B. Cold-blooded
• C. Mammal
• D. Reptile

Answer: (B)

The main idea here is how animals regulate their body temperature. Cold-blooded animals, or ectotherms, cannot generate enough metabolic heat to keep a constant internal temperature. So their body temperature changes with the environment, and they rely on nearby sun, shade, or water to warm up or cool down. This category includes animals like lizards, snakes, and frogs, which is why this description fits them best. Warm-blooded (endothermic) animals generate heat internally to stay constant, which doesn’t match the statement. Mammals fall into that group. Reptiles are often described as cold-blooded, but the most direct fit for the given description is cold-blooded.

The main idea here is how animals regulate their body temperature. Cold-blooded animals, or ectotherms, cannot generate enough metabolic heat to keep a constant internal temperature. So their body temperature changes with the environment, and they rely on nearby sun, shade, or water to warm up or cool down. This category includes animals like lizards, snakes, and frogs, which is why this description fits them best.

Warm-blooded (endothermic) animals generate heat internally to stay constant, which doesn’t match the statement. Mammals fall into that group. Reptiles are often described as cold-blooded, but the most direct fit for the given description is cold-blooded.