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

d. to supply heat to a warmer space

Explanation:

Let's analyze the options

(a) to remove heat from a colder space is the purpose of a refrigerator. Note that heat pump also do this  

(b) to remove heat from a warmer space. This option has no sense, both refrigerators and heat pumps supply heat to a warmer space

(c) to supply heat to a colder space. This option has no sense, both refrigerators and heat pumps remove heat from a colder space

(d) to supply heat to a warmer space. This is the purpose of a heat pump