The correct options are
A We use oxygen in the atmosphere to breathe.
B Plants use carbon dioxide for photosynthesis.
C Atmosphere helps in the formation of rain and snow.
D Atmosphere protects us from the harmful UV and gamma rays from the sun.
The role of the atmosphere in our daily lives include: providing oxygen for us to breathe, providing carbon dioxide to plants for photosynthesis, helping in formation of rain and snow, and protecting us from the harmful rays of the sun.