This visualization displays a hierarchical tree of world regions and countries from a JSON dataset, with each node labeled by its geographic name. The tree layout uses D3 v5’s `tree()` and `hierarchy()` functions, while horizontal curved links are generated with `linkHorizontal()`. Text size decreases with node depth, and the SVG rendering supports pan and zoom via D3’s `zoom()` behavior. Labels include white text shadows for readability, and the layout fills the full browser viewport.