This example presents a three-generation family tree as a static, animated diagram. Circular nodes, colored by generation (blue, red, brown), represent individuals, while black connecting lines show parent-child relationships. The visualization uses d3.stratify() to convert the flat parent-child data into a hierarchy and d3.tree() to compute node positions. Nodes and links animate into place via the `.transition().duration()` API, with all elements rendered as SVG.