Final answer:
This question is about the layers of the Earth's atmosphere and their characteristics.
Step-by-step explanation:
The subject of this question is Earth Science. Specifically, it is about the layers of the Earth's atmosphere and their characteristics.
The ozone layer is found in the stratosphere, which is the second layer of the atmosphere.
The lowest layer of the atmosphere is the troposphere, which starts at the Earth's surface and extends up to about 6 miles or 10 kilometers in altitude.
The ionosphere is an important layer for radiowave reflection and it is found in the mesosphere and thermosphere.