Fact 1: Some animals' fur grows thicker for staying warm in the winter. Fact 2: Mammals are also warm-blooded and are covered with hair or fur. Given the two facts above, answer the question "some animals are what for staying warm in the winter?" with the following options: - hot headed - dormant - coiled - warm-blooded - cold-blooded - When it's cold - chill minded - bullfrogs
warm-blooded