This example displays a family tree as a static node-link diagram, using a sample dataset with a grandparent, two parents, and five children. Node color encodes generation depth: red for the root, green for its children, and blue for leaves. Rendered as an SVG, the visualization applies `d3.tree()` layout and `d3.hierarchy()` to structure the data, then draws vertical links with `d3.linkVertical()` and labels each node. The implementation uses D3.js v7 and defines custom CSS for link and node styling.