This example visualizes a hierarchical tree as a network of nodes and links, using circles for nodes and red paths for edges. The tree structure is derived from a small inline dataset with parent-child relationships. The visualization uses D3.js v6 to stratify and compute the tree layout, and renders SVG elements with animated transitions. Additionally, circles appear with a transition effect, and text labels fade in based on their depth in the tree, demonstrating the use of D3's transition API.