A line chart visualizes annual automobile sales in India from 1999 to 2012, showing sales volume on the y-axis against years on the x-axis. The chart uses D3 v5 APIs including `d3.csv`, `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, and `line` to render an SVG path. Data is loaded from a GitHub-hosted CSV file, with years parsed as dates and sales values converted to numbers. The chart includes labeled axes, gridlines, a title, and a blue stroke for the sales trend.