This example shows an interactive, animated family tree of plants, using color-coded nodes to represent different plant types and connecting them with labeled, arrowed links. The visualization loads hierarchical data from a JSON file and renders it as an expandable tree using D3.js v3’s `d3.layout.tree`, with SVG elements for nodes and links. Users can click nodes to collapse or expand branches, while a zoom behavior and drop-shadow filter enhance the display. The tree layout dynamically recalculates node positions, and collisions are checked during updates.