This example visualizes a hierarchical world countries tree using a cluster layout, with continents branching into subregions and individual countries. Animated dashed paths flow along the links between nodes, creating a dynamic dataflow effect over the static tree structure. The visualization uses D3 v5’s `hierarchy` and `cluster` functions, renders with SVG, and animates the paths via CSS `stroke-dashoffset` keyframes. Node labels display country and region names, and the chart supports zooming through D3’s `zoom` behavior.