This area chart visualizes world population growth from 1960 to 2015, with a maroon filled region under a smoothed curve. The x-axis shows time, while the y-axis displays population counts formatted in billions. Built with D3 v5, the visualization uses `d3.area()` with `curveBasis` for the smooth path, `d3.scaleTime` and `d3.scaleLinear` for scales, and `d3.axisBottom` and `d3.axisLeft` with gridlines. Data is loaded from a CSV file via `d3.csv`, and the SVG rendering includes custom axis labels and a title.