This example shows a hierarchical dataset of animals rendered as a dynamic tree diagram using D3.js v6. The tree layout positions parent and child nodes, with links drawn as horizontal curved paths via `d3.linkHorizontal`. Leaf nodes display custom colors from the data, while internal nodes are light gray, and each node is labeled with its name. The visualization is built with SVG, using D3’s `d3.hierarchy` and `d3.tree` to compute node coordinates, and the SVG height adjusts to fit the tree’s extent.