Correct Option: A

Animals, such as mammals and birds, that maintain a constant body temperature regardless of the temperature of the surroundings are called warm blooded. It describes animal species which have a relatively higher blood temperature, and maintain thermal homeostasis primarily through internal metabolic processes. Examples of warm blooded animals include: mammals, cats, dogs, humans, giraffes, elephants, bears, beavers, chickens, monkeys, whales, deer, cows, wolf, birds, etc. Cold Blooded animals use external means to control their body temperature. These ectothermic methods include basking in the sun, hiding in the shade, changes in metabolic rate. Some animals’ body temperature even change with there environment. Animals that fall into this category are: fish, insects, spiders, frogs, snakes, alligators, toads, turtles, sharks, etc.