A World Population area chart displays global population growth over time, using a filled path to emphasize changes in magnitude. The visualization loads data from a CSV file and renders it as SVG, with time on the x-axis and population on the y-axis. The chart uses d3.area with curveBasis for smooth shading, d3.scaleTime and d3.scaleLinear for axes, and d3.axisBottom and d3.axisLeft for ticks. Population values are formatted from billions to a compact label.