This area chart shows car sales in India from 2009 to 2019, with a black smoothed line tracing the trend and an orange filled region beneath it. The visualization uses D3 v5’s `scaleTime` and `scaleLinear` to map years and sales values, while `line` and `area` generators with `curveBasis` create the curved shapes. Axis ticks are rendered as gridlines, and the CSV data is loaded from a GitHub gist, with dates parsed via `d3.timeParse`.