Precipitation occurs under what condition?

• A. Water droplets become too heavy to stay in the air; rain, snow, sleet, hail
• B. Evaporation increases humidity
• C. Wind speed decreases humidity
• D. Only in deserts due to dryness

Answer: (A)

Precipitation happens when the water droplets in a cloud grow too heavy to be held up by the air’s upward currents; gravity pulls them down as rain, snow, sleet, or hail. Droplets become heavy enough as moisture condenses and they collide and merge within the cloud, and the final form depends on the temperature profile the droplets encounter on the way down. Humidity or evaporation by itself doesn’t force precipitation, and precipitation isn’t limited to deserts—the presence and type of precipitation depend on storm dynamics and atmospheric temperature, not on dryness alone.