This example shows the population distribution by subregion for 2023 using a pie chart. Slices are colored by region, labeled with the region name, and accompanied by a legend displaying each region and its population in millions. The visualization is rendered as SVG using D3 v7, loading data from a Gist CSV file. It employs `d3.pie()` to compute arc data, `d3.arc()` for slice geometry, and `d3.scaleOrdinal(d3.schemeSet3)` for qualitative color mapping. Placeholder axis labels indicate the chart’s non-application of Cartesian coordinates.