This area chart visualizes car sales in India from 2009 to 2019, with a smooth curve showing the trend over time. The chart uses D3 v5’s `scaleTime`, `scaleLinear`, `area`, and `line` generators with `curveBasis` to create a filled orange region beneath a black line. Sales data is loaded from a CSV file, with years parsed via `d3.timeParse` and sales formatted using `format`. The SVG includes labeled axes and gridlines via `axisBottom` and `axisLeft`.