Concept: The ozone layer is a region of high ozone ($O_3$) concentration in the atmosphere that protects life by absorbing harmful UV radiation.
Key Points:
• Ozone layer is mainly found in the
Stratosphere.
• It lies approximately between
15 km to 35 km above Earth.
• It absorbs harmful
UV-B radiation.
Conclusion:
\[
\boxed{\text{Ozone layer is present in the Stratosphere}}
\]