This area chart shows global population growth from 1950 to 2015, with a maroon filled area rising steadily beneath a time-based x-axis. The visualization uses D3 v5’s `scaleTime` and `scaleLinear` for axes, `area()` with `curveBasis` for the smoothed filled shape, and `axisBottom` and `axisLeft` for tick marks. Population values are loaded from a CSV and formatted from billions to “B” on the y-axis.