Explanation: ●The ozone layer ( O3 )is found in the upper part of the atmosphere called the stratosphere.
● It acts as a shield absorbing ultraviolet radiation from the Sun. Hence option 3 is correct.
● UV rays are highly injurious to living organisms since DNA and proteins of living organisms preferentially absorb UV rays, and it's high energy breaks the chemical bonds within these molecules.
Ozone layer lies in the stratosphere region at a height of 25-30 km which lies between tropopause and stratopause.
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<b><u>Explanation</u></b>: <br> ●The ozone layer ( O3 )is found in the upper part of the atmosphere called the stratosphere. <br> <br>●<b> It acts as a shield absorbing ultraviolet radiation from the Sun</b>. Hence option 3 is correct. <br> <br>● UV rays are highly injurious to living organisms since DNA and proteins of living organisms preferentially absorb UV rays, and it's high energy breaks the chemical bonds within these molecules. <br> <br> Ozone layer lies in the <b>stratosphere region at a height of 25-30 km</b> which lies between tropopause and stratopause. <br> <div class="hscrollenable"><span class="sprite DELHIPOLICE_CONSTABLE_MP3_SOL_48></span></div>R