A pie chart displays the net worth of the top 10 billionaires, with each slice labeled in billions of dollars and a color-coded legend listing names and values. The data is loaded from a CSV file using `d3.csv` in D3 v5. The visualization uses `d3.pie`, `d3.arc`, and `d3.scaleOrdinal` with an SVG renderer to generate segments, labels, and interactive legends.