Question

The process by which people walk
Responses
A requires only a little energy.requires only a little energy.
B is powered by the body’s surplus heat energy.is powered by the body’s surplus heat energy.
C relies on the conversion of chemical energy from food into mechanical energy by muscles.relies on the conversion of chemical energy from food into mechanical energy by muscles.
D relies on the creation of mechanical energy by muscles, which is transferred into heat energy.relies on the creation of mechanical energy by muscles, which is transferred into heat energy.

Answer 1

C

Muscles convert chemical energy from food (ATP) into mechanical work to move the body; some of that energy is dissipated as heat, but walking is driven by chemical→mechanical energy conversion.