What percentage of ozone is contained in the stratosphere?
a. 10%
b. 50%
c. 80%
d. 90%

The answer is D. Ninety percent of ozone is contained in the stratosphere. This amount makes the earth safe for living by blocking the harmful ultraviolet rays from the sun before it reach the earth. Ultraviolet rays are harmful for us. It causes sunburn, skin aging, cataracts and skin cancer. The ozone in the atmosphere absorbs almost 99% of UV rays from the sun.

C) reflection (i also looked up the other choices just to make sure)