This area graph visualizes the distribution of female smokers among COVID-19 patients against average population density. The x-axis represents female smoker counts, while the y-axis shows average population density, with a smoothed curve built using D3’s `line()` and `area()` generators with `curveBasis`. The chart renders as an SVG with `scaleTime` and `scaleLinear` axes, loading data from a CSV via `csv()`. Styling is applied through an external CSS file, and the visualization includes labeled axes and a title.