This example presents a branching tree visualization built with D3.js v6. The code uses `d3.stratify()` to structure a dataset of named parent-child relationships into a hierarchy, then `d3.tree().size()` to compute the node positions. The animation, rendered as SVG, reveals the tree structure by initially drawing each connection as a zero-length path from the source node, then transitioning it over one second to its full line. Node labels appear sequentially using `transition().duration(d => 100 + d.depth*1000)`, creating a cascading effect where labels near the root appear before those at deeper levels. The circular nodes use a red stroke with white fill.