This chart displays world population over time using a filled area representation. The visualization uses a time-scaled x-axis for years and a linear y-axis for population, with the area filled in maroon to emphasize magnitude. Built with D3 v5, it leverages `d3.scaleTime`, `d3.scaleLinear`, `d3.area` with `d3.curveBasis` smoothing, and SVG rendering. Data is loaded from a CSV file via `d3.csv`, with axes styled through custom tick formatting that converts values to billions. The chart includes labeled axes and a title, with gridlines created using tick marks.