In the fali, the relative humidity is high in early morning and as the temperature increases, the relative humidity decreases because (3 pts) a. saturation pressure of water increases b. water condenses c. water evaporates d. saturation pressure of water decreases

The correct option is: A. saturation pressure of water increases

Explanation:

Relative humidity, at a given temperature, is defined as ratio of partial pressure of the water vapor preset in the air mixture and equilibrium vapor pressure above pure water.

Relative humidity of a system is dependent upon the pressure and temperature. When the amount of water vapor in a system is constant, the higher relative humidity is higher at low temperature and lower at high temperature. This is because at high temperatures, the air capacity and the saturation pressure increases.

Therefore, in the morning when the temperature is low in fali, the relative humidity is high. As the temperature increases, the relative humidity in fali decreases.