This area chart visualizes global population growth from 1990 to 2020 using a maroon-filled path with a smooth basis curve. The SVG rendering relies on d3.scaleTime for the x-axis, d3.scaleLinear for the y-axis, and the d3.area generator with curveBasis to create the filled region. Axis labels and a title are added via SVG text elements, with tick formatting that abbreviates billions. Data comes from a CSV file loaded asynchronously with d3.csv.