The humidity of the air depends upon

The correct answer is: D. All of the above.

Humidity is the amount of water vapor in the air. It is measured as a percentage of the total amount of water vapor that the air could hold at a given temperature. The higher the temperature, the more water vapor the air can hold. This is why it is more humid in the summer than in the winter.

The humidity of the air also depends on the location. Places near water, such as oceans and lakes, tend to have higher humidity than