The strong liquor in an absorption system develops in the:

In an absorption refrigeration system, the generator plays a crucial role in the creation of strong liquor, which is a concentrated solution of refrigerant in the absorbent. This process occurs when the weak liquor, which has a lower concentration of refrigerant, is heated in the generator. The heat causes the refrigerant to evaporate from the weak solution, concentrating the remaining absorbent. As the refrigerant boils off, it separates from the absorbent, resulting in a strong liquor, which is then sent to the absorber to be mixed with the absorbent solution.

The other components of the system are responsible for different processes: the condenser cools and condenses the refrigerant vapor, the evaporator absorbs heat from the environment to produce cooling, and the absorber is where the refrigerant vapor is reabsorbed into the absorbent, but it does not generate strong liquor. Therefore, the action of developing strong liquor is specific to the generator, making it the correct choice.