Correct Option (c)
Reason : The ozone layer is mainly found in the lower portion of stratosphere, i.e. approximately 20-30 km above the earth, though its thickness varies seasonally and geographically, ozone layer acts as a shield absorbing UV rays from the sun.
Correct Option (c) Reason : The ozone layer is mainly found in the lower portion of stratosphere, i.e. approximately 20-30 km above the earth, though its thickness varies seasonally and geographically, ozone layer acts as a shield absorbing UV rays from the sun.