This area chart visualizes automobile sales by brand, with a steelblue filled path showing the trend across categorical x-axis values. The code loads CSV data from a GitHub repository using `d3.csv`, converts the Sales column to numbers, and renders the SVG chart with `d3.area` for the path, `scaleBand` for the x-axis, and `scaleLinear` for the y-axis. Axis labels for Brand and Sales are added via `d3.axisBottom` and `d3.axisLeft`.