This visualization presents global population trends over time as a filled area chart, using a time-scaled x-axis and linear y-axis. The code imports D3 v5 modules like `area`, `scaleTime`, and `axisBottom` to generate smooth curves and labeled axes. Data is loaded via `csv` from a World Population by Year dataset, with population values displayed in billions. The SVG rendering includes grid lines, a title, and a semi-transparent grey fill beneath the line path.