The humidity of the air depends upon A. Weather B. Temperature C. Location D. All of the above

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 that 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 large bodies of water, such as oceans or lakes, tend to have higher humidity than places that are far from water. This is because water evaporates from the surface of the water and into the air.

The weather can also affect the humidity of the air. When it is raining or snowing, the air is more humid. This is because the water droplets in the air add to the amount of water vapor in the air.

Therefore, the humidity of the air depends on the weather, the temperature, and the location.