Select the most accurate response. Refrigerators and heat pumps are both systems which transfer energy from low-temperature reservoirs to high-temperature reservoirs, against the natural direction of heat transfer. The purpose of a refrigerator is to keep an enclosed space cool. The purpose of a heat pump is: Select one: a. to remove heat from a colder space b. to remove heat from a warmer space c. to supply heat to a colder space d. to supply heat to a warmer space