Question 1228Navigation General

The correct answer is A) fog may form. As the temperature of the air reaches the dew point, the air becomes saturated with water vapor, and the excess water vapor condenses into tiny water droplets, forming fog. This occurs because the dew point is the temperature at which the air can no longer hold all the water vapor it contains, causing the water to condense. The other options are incorrect because: B) water freezes only when the temperature drops below 32°F (0°C), C) rain requires the air to be further cooled below the dew point, and D) snow requires the air temperature to be below freezing, which is not the case when the temperature reaches the dew point.