This visualization shows world population by year as a smooth area chart, with a gradient-filled curve conveying growth over time. The SVG is rendered using D3 v5, employing `scaleTime` and `scaleLinear` for axes, with `area` and `curveBasis` for the path. Data comes from a CSV file loaded via D3’s `csv` function, and axes are customized with `axisBottom`, `axisLeft`, and number formatting that converts values to billions.