Question

identifying thermal energy sources
which energy sources can transfer thermal energy to a heat pump? check all that apply.
air
the ground
water
gas fuel
wood fuel

Explanation:

Heat pumps extract thermal energy from external sources. Air, ground, and water are renewable thermal energy sources that heat pumps can utilize. Gas fuel and wood fuel are combustion - based and not directly transferred as thermal energy to a heat pump in the same way.

Answer:

air, the ground, water