A pie chart visualizes 2021 car sales data by type, fetched from a remote CSV file. Each slice is colored using `d3.scaleOrdinal` and `d3.schemeCategory10`, with arcs generated by `d3.arc()`. The chart displays car type labels and percentages, positioned using arc centroids. A legend, built with HTML `div` elements, is placed beside the SVG chart. The implementation uses D3 v5 with `d3.pie()` for data processing and `d3.csvParse` for data loading, all rendered as SVG.