Why do we need air? If you know please answer this

I found this on the internet People need to breathe, and so do lots of other animals—and plants! Breathing is part of a process called respiration. During respiration, a living thing takes in oxygen from the air and gives out carbon dioxide.

Explanation:

10 Interesting Things About Air | NASA Climate Kidsclimatekids.nasa.gov › 10-things-air

Your welcome!

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.