Answer :
The correct answer (b)it protects the earth's surface from uv radiation.
Some of the Sun's biologically harmful ultraviolet radiation is absorbed by ozone in the stratosphere. Stratospheric ozone is referred to as "good" ozone due to this advantageous role.
Three oxygen molecules (O3) combine to form the odorless, colorless gas known as ozone, which occurs naturally in the environment. Both the upper atmosphere of the Earth, known as the stratosphere, and the lower atmosphere, known as the troposphere, can contain it.
Can you smell ozone?
Ozone has a very characteristic pungent odor, sometimes described as like chlorine bleach, and it can sometimes be detected after lightning strikes or during electrical discharges. Individual humans vary in their ability to smell ozone; some people can smell it at levels as low as 0.05 ppm
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