Answer: c. a diagram that explains the steps involved in photosynthesis
Step-by-step explanation:
The best graphic to use would be one that explains the processes involved in the process of photosynthesis. The best option is therefore the third one as it would actually show useful information on what photosynthesis is and how plants use it to get energy.
The first option would not educate anyone on what photosynthesis is as it does not talk about the process. The second and fourth options are the same.