This area chart visualizes the sales of cars in India from 2009 to 2019, using a smooth basis curve to show both the line and the shaded area beneath it. The chart is rendered as an SVG using D3 v5, with scales for time and linear values. Data is loaded from a CSV file, and the visualization employs `scaleTime`, `scaleLinear`, `axisLeft`, `axisBottom`, and `area` APIs to construct the plot. The line and area paths are generated with `line` and `area` generators using `curveBasis`.