How can humidity impact wind density?

Humidity plays a crucial role in the density of air. When humidity increases, the amount of water vapor in the air rises, which is less dense than the nitrogen and oxygen that comprise the majority of dry air. Thus, as humidity rises and water vapor replaces heavier air molecules, the overall density of the air decreases.

This relationship is essential for understanding weather patterns and phenomena because less dense air can lead to rising currents, turbulence, and impacts on sailing and flying conditions. High humidity can also influence the formation of clouds and precipitation, which can then further affect local winds and weather stability.

The choice suggesting a decrease in wind density accurately reflects how increased humidity, through the addition of water vapor, reduces the mass of air, thus lowering its density.