This area chart visualizes LEGO sales over the past decade, showing a smooth, curved trend of annual revenue growth. The visualization uses D3 v5 APIs, including `area` and `line` generators with `curveBasis` for smooth interpolation, along with `scaleTime` and `scaleLinear` for axes. Gridlines and axis labels are rendered via `axisBottom` and `axisLeft`. Data is loaded from a CSV hosted on GitHub, parsed with `timeParse`, and displayed as an SVG with a steelblue filled area and darkblue line.