Question

1) what is co2 and o2?

Answer 1

1. co2 means carbon dioxide.
2. o2 means oxygen.
these are gases of atmosphereic for the plants life . co2 breaks down photosynthesis and from o2
hope this will help u.

Answer 2

CO2  and O2 are gases
both are atmospheric gases that are necessary for life.Plants take CO2 and break it down in photosynthesis, produce O2