This example displays a stacked bar chart of normalized car statistics (horsepower, torque, and highway MPG) for 31 makes, with each row showing the proportional contribution of each metric. The visualization uses D3 v7 to load CSV data, normalize values via `d3.sum`, and render the chart as SVG with `d3.stack`, `d3.scaleBand`, and `d3.scaleOrdinal` for colors. Interactive tooltips appear on mouseover, revealing the percentage share of each stat, alongside a custom legend. The data comes from `data.csv`, and the code demonstrates modular ES6 imports and UNPKG loading.