Provide a detailed explanation of the process of photosynthesis, including the role of chlorophyll, in [num_paragraphs] 4 paragraphs. Use the markdown divider: ***  to separate the paragraphs. Highlight at least [num_highlights] 2 sections in your answer with markdown, i.e. *highlighted section*. In your response, the word *photosynthesis* should appear [relation] at least [frequency] 3 times.

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