This visualization shows a three-level hierarchical tree of food categories, displaying a root node ("Food"), three category nodes (Fruits, Vegetables, Grains), and nine leaf items. The SVG rendering uses d3.hierarchy and d3.tree() to compute the layout, with d3.linkVertical() drawing the curved connections. Nodes are distinguished by shape and color: a yellow circle for the root, light-blue rounded rectangles for categories, and green diamonds for leaf items, each accompanied by text labels. The page includes a static, inline JavaScript dataset with no external data source.