This area chart visualizes global population change over time, sourced from a CSV of world population by year. The visualization uses D3 v5’s `scaleTime` and `scaleLinear` to map the temporal and population axes, while an `area` generator with `curveBasis` renders the filled path. Axis labels and tick formatting, including converting values to billions, are handled via `axisLeft`, `axisBottom`, and D3’s `format` function.