This visualization displays a hierarchical tree of world regions and countries, branching from a global root down through continents and subregions to individual nations. The tree uses horizontal links and text labels sized by depth, with larger text closer to the root. It is rendered as SVG using D3 v5’s `tree()` layout, `hierarchy()`, `linkHorizontal()`, and `zoom()`. The data comes from `data.json`, and the red-stroked paths and text shadows create a distinctive visual style.