This interactive donut chart displays the proportion of income from Sales, Dividends, and Interest, with each slice labeled by category and showing a percentage on hover. Built with D3 v5, it uses `d3.pie`, `d3.arc`, and `d3.scaleOrdinal` to generate SVG paths, while tooltips are implemented via mouse events and a styled HTML div. The chart reads its data from a CSV file, computing percentages from the parsed values, and features rounded slice corners and a responsive hover opacity effect.