Air is a mixture of gases.we can't live without air as it has many important features with respect to our life like:-
1. air contains oxygen which we need for respiration, it suppots burning etc.
2. it contains ozone gas which protects our planet from uv rays.
3.it contains carbon dioxide which is needed for photosynthesis and also keeps our earth warm.
4. it contains nitrogen which is essential for formation of protein inplants.
!1hope it helps,,please mark as brainliest!!