A
Chemical treatment of municipal drinking water supplies
B
Thermal management technique circulating liquid coolant near processors to lower energy consumption
C
Desalination of seawater for agricultural irrigation in arid regions
D
Hydraulic power generation for backup server batteries
Correct answer: (b) Thermal management technique circulating liquid coolant near processors to lower energy consumption
Explanation
Direct Liquid Cooling is a thermal management technique that circulates liquid coolant near high-density processors to effectively lower energy consumption and manage heat. Options A, B, and D describe completely unrelated water management or power functions.