This pie chart visualizes population data across regions, with each slice labeled by region name and population in millions. The chart is rendered as an SVG using D3.js v7, which fetches CSV data via `d3.csv` and applies `d3.pie` and `d3.arc` to generate the slices. A color scale (`d3.scaleOrdinal`) assigns distinct colors from `d3.schemeCategory10`, and a legend on the right identifies each region. The labels use `arcGenerator.centroid` for positioning, while the data source is a remote CSV file.