This visualization presents a hierarchical tree of world countries, organized by continent and subregion, using a tidy tree layout with horizontal links. The data is loaded from a JSON file and rendered as SVG, with text labels sized by depth level. It uses D3's `tree()`, `hierarchy()`, and `linkHorizontal()` APIs to position nodes and draw curved connecting paths, while a zoom behavior enables panning and scaling the entire graphic. The hand-drawn font and soft stroke color give the chart a casual, sketch-like appearance.