This area chart visualizes monthly visitor data, distinguishing total, new, and returning visitors with three semi-transparent overlays in blue, green, and red. The chart uses d3.area() to generate stacked paths from CSV data loaded via d3.csv, with d3.scaleBand and d3.scaleLinear mapping months and visitor counts. SVG axes, tick styling, and a legend clarify the values. The source CSV provides the monthly metrics, and all rendering occurs in SVG within a 1000×500 pixel canvas.