Humidity levels in tropical climates range from which of the following?

• A. 0%-100% relative humidity
• B. 0%-50%
• C. 50%-100%
• D. 60%-90%

Answer: (A)

Relative humidity is the percentage of water vapor in the air relative to the maximum amount the air can hold at that temperature. It can range from 0% (completely dry air) to 100% (air saturated with moisture). In tropical climates, temperatures are high, so the air can hold a lot of moisture, often making humidity feel very high, but the actual value can still vary from very dry to fully saturated depending on time of day, rainfall, and ventilation. Because of this, humidity levels can theoretically span the full 0% to 100% range, making that option the best answer. The narrower ranges would exclude possible conditions, so they don’t capture the full variability of humidity.