This tree visualization displays a family hierarchy with nine individuals, starting from Ben at the root and branching down through three generations. The D3 v5 code uses `d3.stratify` to convert the flat parent-child data array into a tree structure, then `d3.tree` to calculate node positions. Nodes are rendered as colored circles—red for the root, blue for the first generation, and green for the second—with names labeled to the right. Curved paths connect parent and child nodes, drawn with cubic Bézier curves.