Question

What is the main type of energy conversion taking place?

(3 points)

Chemical energy is converted to mechanical energy as the energy from digested food provides energy for movement.

Mechanical energy is converted to thermal energy as the energy from movement creates heat in the surrounding air.

Mechanical energy is converted to chemical energy as the movement from movement creates reactions in the surrounding air.

Thermal energy is converted to mechanical energy as the energy from heat provides energy for movement.
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Answer 1

Chemical energy → mechanical energy.

The muscles convert chemical energy from digested food into mechanical work for movement (with some waste heat produced).