How can strong wind affect dew formation?

Correct answer: It prevents a stable cool moist layer near the surface

Correct answer: A. Dew needs a surface to cool sufficiently, usually during a clear night, while moist air remains near that surface. Calm or very light wind can help maintain this shallow, cool, humid layer. Strong wind mixes the air vertically and horizontally. It may bring warmer, drier air into contact with the surface and can also reduce the stable conditions needed for the surface to reach its dew point. Therefore strong wind generally makes dew formation less likely. A is correct because it describes this disruption of the near-surface layer. B is wrong because wind does not automatically freeze every water-vapour molecule into frost; frost requires temperatures at or below freezing and suitable conditions. C is wrong because wind does not always lower the surface below the dew point. D is wrong because wind may move clouds but cannot turn them into the ground. Memory cue: calm air supports dew; strong mixing usually opposes it.