This visualization displays a family tree as a tidy tree layout using D3.js v5. The code defines hierarchical data with parent-child relationships and renders it as an SVG, with circular nodes colored by depth (green for the root, red for the second level, and blue for deeper nodes). Curved paths connect parent and child nodes using cubic Bézier commands. Each node is labeled with the person’s name. The example uses D3’s `stratify`, `tree`, and `links` APIs to compute the layout and structure.