This visualization shows annual car sales in the United States over time, combining a blue line chart with a pink filled area beneath it. The chart uses D3 v5’s `scaleTime`, `scaleLinear`, `line`, and `area` generators with `curveBasis` to smooth the path. Data comes from a CSV file loaded via `d3.csv`, with years parsed using `d3.timeParse`. Axes are rendered with `axisBottom` and `axisLeft`, and the SVG output includes gridlines from tick sizes.