This area chart visualizes monthly sales growth from January 2021 through January 2025, with each data point from the `sales_area.csv` file showing a steady upward trend. The visualization uses D3.js v6, employing `d3.scaleTime`, `d3.scaleLinear`, `d3.area`, and `d3.curveMonotoneX` to render a smooth, filled area path in SVG. The chart includes rotated x-axis labels, grid lines, and axis labels, with the area fill set to `lightsteelblue` with a `steelblue` stroke.