Which weather condition typically occurs in the presence of significant turbulence?

Significant turbulence is primarily associated with rapid fluctuations in wind direction and speed. This turbulence can arise from various atmospheric conditions such as mountain waves, thunderstorms, or changes in weather fronts, all of which can lead to irregular and unpredictable shifts in wind patterns. In these situations, the air experiences vertical and horizontal movements that can result in bumpy or erratic flight conditions.

Calm and steady conditions typically indicate stable air where such turbulence is minimized, while consistent and predictable weather patterns reflect a lack of turbulence. Clear and dry air generally suggests stable atmospheric conditions as well, which do not contribute to significant turbulence. Therefore, the nature of turbulence inherently involves these rapid changes in wind, making it the correct response in this context.