caption: The image shows a diagram of the photo auto trophie, which is a process of photosynthesis. It consists of a series of interconnected circles, each representing a step in the process, with arrows connecting them to indicate the direction of the process. The circles are labeled with words such as "photo," "auto," and "trophie," and the arrows indicate the flow of water from one step to the next. The diagram also includes a legend that explains the meaning of each step.