This area chart displays car sales from 2013 to 2021, with the x-axis representing years and the y-axis showing sales figures. The chart combines a black line with a red filled area beneath it, using a smooth basis curve to connect the data points. Built with D3 v5, the visualization uses `scaleTime` and `scaleLinear` for axes, `line` and `area` generators with `curveBasis` for the chart elements, and `csv` to load the data from a GitHub gist.