According to the second law of thermodynamics, heat energy released by an organism is released into the <span>environment and unusable. This energy is also known as entropy which is defined as the tendency of things to be dispersed and spontaneous. This means that entropy is always random and becomes unavailable energy.</span>
The the passage this question was provided for, you may find the fallowing text: "When a process converts energy from one form to another, some energy converts into heat, a less usable form that disperses into the environment."
Answer: Released into the environment and unstable.
