Earth is surrounded by a blanket of air called

Earth is surrounded by a blanket of air called the atmosphere.

All living organisms depend on this atmosphere to survive as the atmosphere provide the necessary air that we breath and also protects us from the harmful radiations of the sun.

The atmosphere is mainly composed of four layers which are:
1- Troposphere which has the air that we breath
2- Stratosphere which has the ozone layer
3- Mesosphere
4- Ionosphere

Gravity bc it’s gravity