This example presents two side-by-side visualizations: a hierarchical tree of food categories and a force-directed network of named individuals. The tree displays Food, Fruits, Vegetables, and Grains as colored nodes connected by vertical links, with each layer assigned a distinct fill color. The network employs d3.forceSimulation with forceLink, forceManyBody, and forceCenter to position six people nodes and their relational links. Both SVG outputs are built using D3 v7, with the tree using d3.tree and d3.linkVertical for layout.