This fork of the World Countries Tree visualization displays a hierarchical dataset from data.json, where a root node labeled “Father” branches into seventy identical children named “Joe.” The D3.js v7 code uses `tree()` layout and `linkVertical()` to draw connecting paths, with text labels rotated for leaf nodes. SVG rendering supports interactive zooming via `zoom()`, while font sizes scale dynamically based on sibling count using the imported `scale` API.