plants taking in carbon dioxide water changing from a gas to a liquid oxygen converting to cellular energy bacteria removing nitrogen from the atmosphere
I gave my students this multiple choice question: Which is a step in the process of photosynthesis?

Only one answer is correct among these 4 choices:
- plants taking in carbon dioxide
- water changing from a gas to a liquid
- oxygen converting to cellular energy
- bacteria removing nitrogen from the atmosphere

Could you tell me which one is correct?

plants taking in carbon dioxide