This chart visualizes car sales from 2013 to 2021, combining a smooth line and a filled red area to show sales trends over time. The data is loaded from a CSV file and parsed with `d3.csv` and `d3.timeParse`. The visualization uses `d3.scaleTime` and `d3.scaleLinear` for axes, with `d3.line` and `d3.area` generators employing `d3.curveBasis` for smoothing. SVG rendering includes gridlines, axis labels, and formatted tick values using `d3.format`.