This pie chart visualizes 2022 U.S. auto sales by brand, with each slice’s size proportional to its year-to-date sales figures. The code loads data from a CSV file via `d3.csv`, then uses `d3.pie` and `d3.arc` to generate SVG paths for the chart. A `d3.scaleOrdinal` maps sales values to distinct colors, while a legend displays brand names and formatted sales totals using `d3.format`. The visualization is rendered entirely as SVG within an HTML page, with styling applied through an external stylesheet.