The heat absorbed by the evaporator is referred to as the heat:

The heat absorbed by the evaporator is accurately referred to as the heat given up by the medium or product being cooled. In an HVAC system, the evaporator's primary function is to absorb heat from the surrounding environment—typically from the air or a fluid that needs to be cooled.

When the refrigerant enters the evaporator, it is in a low-pressure liquid state and absorbs heat from the medium, causing it to evaporate and change into a gas. This process is essential for cooling, as it directly results in the reduction of temperature in the environment or medium from which heat is being extracted. By defining the heat absorbed in this way, it emphasizes the role of the evaporator in facilitating the cooling process through the absorption of surrounding heat.

The other options may address related concepts within the refrigeration cycle but do not accurately capture the nature of the heat absorbed by the evaporator specifically.