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This example shows a hierarchical sales organization as a tree diagram, with the root labeled "Global Sales" branching into country-level regions, sales representatives, and product nodes. It uses D3 v7’s `d3.tree()` layout and `d3.hierarchy()` to compute node positions, then renders SVG paths and text via `d3.select` and `enter()`. Node shapes vary by depth—rectangle, diamond, triangle, and circle—and each node’s fill color changes by level, using custom path data for each geometric form.