This area chart visualizes population trends for ten countries over time, highlighting changes in population size across several decades. The chart is rendered as an SVG using the D3.js library, with data processed from a CSV file via the `csv()` API. It uses D3's stacking and area functions to create layered regions, with a legend and axes labeled "Years" and "Population (millions)" to guide interpretation. The chart employs `d3.scaleTime` for the x-axis and a linear scale for the y-axis, with gridlines for readability.