This area chart shows the number of medals won by the USA over time, with the area under the curve filled in orange. The visualization uses D3 v5 to load CSV data, apply a time-based x-scale and linear y-scale, and generate the area shape with `d3.area()`. Curve smoothing is applied via `curveBasis`, and both axes include custom tick formatting and labels. The chart is rendered as an SVG, with a title and axis labels styled in red and purple.