A network visualization maps relationships between tree families and species, with color encoding hierarchy levels (root, family, species) and node size representing average height. The force-directed layout uses d3.forceSimulation with link, charge, center, and collide forces to position nodes, while SVG rendering draws links and draggable nodes. Hovering a species displays a tooltip with details, and the dataset loads from an external CSV file via a custom parsing function that handles both regular and single-line formats. D3 v7 powers the interactive simulation, styling, and event handling throughout.