This interactive visualization displays a hierarchical tree structure, allowing users to click on nodes to expand or collapse their child branches. The tree’s layout dynamically repositions nodes with animated transitions, adjusting the SVG canvas height to fit the visible structure. Built with React and D3 v6, it uses the `d3.tree()` layout, `d3.linkHorizontal()` for connecting links, and reads hierarchical JSON data from a remote file. Node labels are rendered alongside circular markers, with parent and leaf nodes shown in different colors.