This example visualizes a hierarchical animal taxonomy as a tree, with green circles representing each node and red lines tracing the connections between parent and child categories. The dataset is manually defined in JavaScript, listing animals such as Wild, Tiger, Lion, and Pets, with branches extending to species like Cheeta, Black tiger, and Dog. The visualization uses D3.js v6’s `d3.stratify` and `d3.tree` layout to position nodes, while SVG circles and paths render the structure. Animated transitions animate the links drawing downward, and text labels appear with staggered delays based on node depth, bringing the classification hierarchy to life.