This pie chart displays the number of car units sold for different car models, using a dataset of units per car name. The visualization renders each segment as an arc with a distinct color and includes a legend showing the car name and its corresponding value. Built with D3 v5, it uses the `pie` and `arc` generators to compute the segments, while `scaleOrdinal` assigns colors and `format` handles the numeric tick labels. The data is loaded asynchronously via `d3.csv` from a GitHub gist.