Which method is considered passive cooling?

• A. Use of misting fans
• B. Rest in an air-conditioned environment
• C. Immersion in cool water
• D. Application of wet towels

Answer: (B)

Passive cooling means letting the environment do the work to lower body heat, with little or no extra effort or external cooling applied by the person. Resting in an air-conditioned environment provides a cool surroundings that allows heat to dissipate from the body through natural processes like convection, radiation, and the body’s own sweating, without adding external cooling actions or increasing metabolic heat production. The other options involve external cooling aids or direct cooling actions—misting fans and wet towels promote evaporation with added surface contact and energy input, while immersion in cool water actively draws heat away through conduction and immersion. So resting in a cool room best exemplifies passive cooling.