A pie chart displays the proportional spending across unnamed categories, with each slice color-coded and paired with a legend on the right side. The visualization loads CSV data from a GitHub repository using `d3.csv`, then constructs the chart with `d3.pie()` and `d3.arc()`. Color assignment uses `d3.scaleOrdinal` with the `schemeSet2` range. The SVG is rendered via D3 v7, with slices stroked in white and space reserved for axis labels.