This interactive network graph visualizes relationships among car types, transmission types, and door counts. Using D3.js, it loads a CSV dataset and constructs a hierarchical node-link diagram with red, steelblue, and orange circles representing the categories. The `d3.forceSimulation` API handles physics-based layout with `forceLink` for edges, `forceManyBody` for repulsion, and `forceCenter` for positioning. Users can drag nodes via `d3.drag`, with the simulation adjusting in real time. The visualization renders as an SVG with labeled nodes and gray connecting lines.