How does the human body keep warm on a cold day?

A. it converts chemical potential energy into thermal energy

B. it converts thermal kinetic energy into potential energy

C. it converts thermal potential energy into thermal kinetic energy

D. It converts chemical kinetic energy into potential energy

A. Potential energy can be thought of as an intermediate between conversion of forms of energy. Thus, the correct beginning and ending of the conversion of forms of energy is chemical; from molecules of glucose for example, chemically broken down to produce ATP to fuel homeostasis by the body to produce; thermal energy.