The process of achieving or maintaining the temperature of a space or object below that of the surrounding area by removing heat is?

• A. Cooling
• B. Refrigeration
• C. Evaporation
• D. Freezing

Answer: (B)

The key idea is a sustained, engineered method to remove heat so something stays colder than its surroundings. Refrigeration achieves this by circulating a refrigerant in a closed cycle to absorb heat from the space or object and reject it elsewhere, keeping the temperature below ambient. Evaporative cooling can lower temperature through phase change but isn’t the full, maintained process described here. Freezing is simply reaching a very low temperature where matter becomes solid, not the method itself. Cooling is a general term for lowering temperature, but refrigeration specifically refers to the continuous system that maintains that cold condition. So the described process is refrigeration.