i,ll mark you the brainlyest, What is the difference between oxygen gas and ozone gas?

*Oxygen gas is not necessary for animals to exist, ozone is important to breathing.

*There is no difference between oxygen gas and ozone; they are the same thing.

*Oxygen gas contains two atoms of oxygen, ozone contains three atoms. Ozone gas is found in small amounts in the atmosphere.

*Ozone gas is found only in the upper atmosphere; oxygen gas is found very close to Earth's surface.