Multiple choice

Human breathing at a place

  1. increases the dryness of air

  2. decreases the dryness of air

  3. does not alter the dryness

  4. none of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Human exhalation contains a high concentration of water vapor from the lungs. Adding this moisture to the surrounding environment increases the humidity, which is the opposite of dryness.