What percentage of water vapor is found in the air?
a. 0 to 1 percent
b. 0 to 4 percent
c. 0 to 8 percent
d. 0 to 10 percent

(B) 0 to 4 percent

Explanation:

 The 0 to 4 percent of the water vapor are found in the air. At the point when a volume of the air at the given temperature holding the greatest measure amount of the water fume, then the air is known as the saturation.

In the air, the amount of the water vapor are tend to decreases with the altitude. It is basically due to the temperature, when the temperature are get decreases with the height.

Therefore, Option (B) is correct.