A family tree chart built with D3.js (v3.5.17) displays hierarchical data in a static, animated SVG layout using `d3.layout.tree` and `d3.svg.diagonal` for curved links. Nodes are colored circles with labels, color-coded by parent and leaf status, and respond to clicks for interactivity. The visualization uses an HTML page with embedded CSS and JavaScript, rendering from hardcoded JSON family data.