Mr. Johnson wants to create a mind map for his students to help them…

To create a mind map for photosynthesis, Mr. Johnson needs a tool specifically designed for visual concept mapping and organizing ideas hierarchically. Mindmeister is an online mind-mapping application that allows users to create, share, and collaborate on visual diagrams connecting central concepts like photosynthesis with related subtopics such as sunlight, water, and chlorophyll. This makes it the most suitable choice for this task.\nIn contrast, Edpuzzle is designed for embedding questions into video lessons rather than creating diagrams. Nearpod focuses on delivering interactive presentations and real-time student engagement through slides, not for mapping concepts visually. Hot Potato is used to create multimedia quizzes and exercises like matching or multiple-choice questions, which does not align with the goal of creating a visual mind map. Therefore, Mindmeister is the correct tool for structuring complex biological concepts visually.