This area chart visualizes car sales in India from 2009 to 2019. It uses a combination of a line and an area chart to show the sales trend over time. The visualization is built with D3 v5 and renders as an SVG, using the `d3.area` and `d3.line` generators with a basis curve to create a smooth path. Data is loaded from a CSV file, with the year parsed using `d3.timeParse` and sales values converted to numbers. The chart includes labeled axes and a colored area fill to emphasize the data.