Answer: chemical to mechanical
Explanation:
Chemical energy is the energy stored in the bonds of molecules.
Mechanical energy is the energy possessed by a body by virtue of its position and motion.
Thermal energy is the energy possessed by a body by virtue of its temperature.
According to law of conservation of energy, energy remains conserved. It only transforms from one form to another. When food is oxidized, the chemical energy stored in the bonds of food converts to kinetic energy which is the energy possessed by an object by virtue of motion.