which gas in earths atmosphere forms ozone? oxygen nitrogen water vapor carbon dioxide

which gas in earths atmosphere forms ozone? oxygen nitrogen water vapor carbon dioxide
Answer
Brief Explanations:
Ozone ($O_3$) is formed from oxygen ($O_2$) through a photochemical reaction. High - energy ultraviolet radiation from the sun breaks oxygen molecules into individual oxygen atoms, which then combine with other oxygen molecules to form ozone.
Answer:
A. oxygen