This area chart visualizes population values across a small set of years, with the data sorted by year to create a continuous filled shape. The visualization uses D3 v7 to render an SVG, employing linear scales for both axes, `d3.area()` to generate the filled path, and `d3.axisBottom` and `d3.axisLeft` for tick marks. The chart is drawn with a steelblue fill, black stroke, and labeled axes for Year and Population, based on hardcoded sample data.