Step-by-step explanation:
Atmosphere is the thin layer of air that surrounds the Earth´s surface . Atmosphere is hold by the gravity exerted by the Earth . There are different layers of atmosphere :
Troposhere
Hydtosphere
Mesosphere
Thermosphere
Exosphere
There are various gases present in the atmosphere ( oxygen , nitrogen , carbon dioxide , sulphur oxide , etc. )
Atmosphere possess the great role as it consists of the Oxygen gas which is the transcendenatl element for the existence of living beings .
Atmosphere provides the shield against the UV. rays