You can determine the wind direction by wetting your finger and holding it up in the air. Explain.
A. The moisture on the finger evaporates faster on the side facing the wind, creating a cooling effect.
B. Wind causes a change in the electrical conductivity of the wet finger, leading to a noticeable sensation.
C. The wet finger acts as a natural wind vane, aligning itself with the wind direction.
D. Evaporation of moisture on the finger produces a cooling effect, and the side facing the wind feels cooler.