Question

What kind of energy source transforms heat energy from the Earth into mechanical and electrical energy?

a. Geothermal
c. Solar
b. Hydro-electric
d. Turbine

Answer 1

It is the Geothermal energy which transforms heat energy from the earth into mechanical and electrical energy.

Answer 2

I think it would be geothermal considering its word roots. Hydro-electric is from water, solar is from the sun, and turbine is from wind.