Answer:
liquid cooling.
Step-by-step explanation:
Remember that entropy can be interpreted as the degree of disorder or randomness in the system.
When we're releasing energy in form of heat in a spontaneous reaction (endothermic process), the entropy is increasing.
In a nonspontaneous reaction, we require energy from an external source (endothermic process), in this case, the entropy decreases.
Based on this logic, when we want to cool a liquid, we require energy to do it, so the entropy, in this case, decreases. The answer would be liquid cooling.