Explanation:

Explanation: The troposphere is the most important layer of the atmosphere. Its average height is  13 kilometers. The air we breathe exists here. Almost all the weather phenomena like rainfall, fog  and hailstorm occur in this layer. The troposphere is the most important layer of the atmosphere. Its  average height is 13 km. The air we breathe exists here. Almost all the weather phenomena like  rainfall, fog and hailstorm occur in this layer. The stratosphere is almost free from clouds and  associated weather phenomenon, making conditions most ideal for flying aeroplanes. Mesosphere is the third layer of the atmosphere. It lies above the stratosphere. It extends up to the  height of 80 km. Meteorites burn up in this layer on entering from the space. The temperature rises very rapidly with increasing height in the thermosphere. The ionosphere is a  part of the thermosphere. It extends between 80 and 400 km.