During a vigorous workout, a person's body converts stored chemical energy into kinetic energy and heat. How does this process illustrate the second law of thermodynamics?

The conversion of chemical energy into kinetic energy decreases the overall entropy in the body.

All of the chemical energy is efficiently converted into kinetic energy without any loss.

Some of the chemical energy is lost as heat, increasing the entropy of the surrounding environment.

The kinetic energy generated during the workout is stored again as chemical energy in the body.