How do different representatives of the animal kingdom adapt to temperature changes?

There are two types of animals: cold-blooded and warm-blooded. The first include fish, lizards, insects. They carry cold in an inactive state. The second includes birds, mammals. In the cold season, they regularly increase their body size and the weight of internal organs related to the regulation of metabolic processes (heart, kidneys, liver) and protruding parts of the body (ears, tail)

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