This area chart visualizes car sales in India from 2009 to 2019, using a smooth curved line to show yearly trends and an orange filled region beneath it to emphasize volume. The SVG rendering relies on D3 v5’s `area`, `line`, `scaleTime`, `scaleLinear`, and `axisBottom`/`axisLeft` APIs, with data loaded via `csv` from a GitHub gist. The chart includes labeled axes, gridlines from tick marks, and a formatted y-axis using `format('.3s')` for compact number display.