This chart visualizes the number of car units sold per car model as a donut pie chart, with each segment sized proportionally to its value and a corresponding legend that pairs each car category with its numeric sales figure. The visualization is built using D3 version 5, employing `d3.pie`, `d3.arc`, and `d3.scaleOrdinal` to generate the arcs and color scheme, while data is loaded asynchronously from a CSV file via `d3.csv`. The SVG output positions the donut centered at the left, with the legend displayed on the right, and uses a custom text formatting function for axis tick labels.