What does entropy measure? a. the change in phases of matter in a system b. the amount of energy in a system c. the change in temperature of a system d. the disorder of a system

D) the disorder of a system.

See, Entropy is the measure of a system’s thermal energy per unit temperature that is unavailable for doing useful work. Because work is obtained from ordered molecular motion, the amount of entropy is also a measure of the molecular disorder, or randomness, of a system. The concept of entropy also provides us with deep insight into the direction of spontaneous change for many everyday phenomenon like phase change in water.

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the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.