The correct answer is B) Clouds form. When rising air cools to the dew point, the water vapor in the air condenses into tiny water droplets, forming clouds. This happens because as air rises, it expands and cools, causing the relative humidity to increase until it reaches 100% at the dew point temperature. At this point, the water vapor condenses into visible water droplets, creating clouds. The other answer choices are incorrect: A) Advection fog forms when warm, moist air moves over a cooler surface, causing the water vapor to condense. C) Humidity decreases as the air cools and the water vapor condenses into clouds. D) Winds do not necessarily increase when air cools to the dew point and clouds form.