This interactive tree diagram visualizes a hierarchical dataset of automotive brands organized under work packages. The visualization uses an animated, collapsible layout where nodes represent brands like General Motors, Volkswagen, and their subsidiaries. Built with the D3.js library (version 3.5.17) in JavaScript, it employs the `d3.layout.tree` function for hierarchical layout, `d3.svg.diagonal` for curving links, and SVG paths with CSS styling for orange connections and white circular nodes. The HTML page renders both the tree and data labels in a clean, minimalist interface.