The picture shows a woman running.

Question

What is the main type of energy conversion taking place?

a
Mechanical energy is converted to thermal energy as the energy from movement creates heat in the surrounding air.
b
Mechanical energy is converted to chemical energy as the movement from movement creates reactions in the surrounding air.
c
Thermal energy is converted to mechanical energy as the energy from heat provides energy for movement.
d
Chemical energy is converted to mechanical energy as the energy from digested food provides energy for movement.

Answer 1

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