An interactive area chart displays total online sales revenue by year, with a smooth line and shaded region that highlight revenue trends over time. The visualization loads CSV data and parses dates using D3’s time parsing, then scales the axes with `scaleTime` and `scaleLinear`. It renders an SVG with an axis-left and axis-bottom, and generates the line and area paths using `line()` and `area()` with `curveBasis`. The styling, including gridlines and color, is applied via CSS.