Here's a breakdown:

* Air: Air is the mixture of gases that surrounds the Earth. It's what we breathe.

* Oxygen: Oxygen is a colorless, odorless gas that makes up about 21% of the air we breathe.

Other gases found in air include:

* Nitrogen: Makes up about 78% of air.

* Argon: Makes up about 1% of air.

* Carbon dioxide: A small but crucial component of air.

Why is oxygen so important?

Oxygen is essential for life on Earth because:

* Respiration: Animals and plants use oxygen for respiration, which is the process of converting food into energy.

* Combustion: Oxygen is needed for fire to burn.

In summary:

* Oxygen is a vital component of air.

* Air is the mixture of gases we breathe, containing oxygen along with other gases.

* Oxygen is essential for life and many processes on Earth.