This area chart visualizes world population growth over time, with the x-axis representing years and the y-axis showing population in billions. The visualization uses a smooth, curved area path filled in maroon, with grid lines and labeled axes for clarity. It employs D3 v5’s `scaleTime`, `scaleLinear`, `area`, `curveBasis`, and `axisBottom`/`axisLeft` to render the SVG chart. Data is loaded from a CSV of world population by year, with values parsed and formatted using `format`.