This visualization shows global population trends over time as a filled area chart, with the area beneath the curve shaded in steel blue. The code uses D3 v5’s `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, and `area` generator with a `curveBasis` smoothing. Data is loaded via `csv` from a remote world-population-by-year dataset and rendered as SVG, with axis labels, tick formatting, and a chart title styled through CSS.