Which statement correctly pairs air stability with turbulence and visibility?

• A. Unstable air → turbulence and good surface visibility
• B. Stable air → turbulence and good visibility
• C. Unstable air → no turbulence and poor visibility
• D. Stable air → no turbulence and good visibility

Answer: (A)

Unstable air means buoyant air parcels rise easily, which creates convective activity and turbulence. Yet this same mixing tends to disperse moisture and pollutants, so surface visibility is usually good. In contrast, stable air suppresses vertical motion, allowing fog, haze, or low clouds to linger near the ground and reduce surface visibility, while the air remains smooth. So the combination of turbulence with good surface visibility best matches how unstable conditions behave at the surface.