This donut chart visualizes credit rating distributions, with categories like "AAA Local" and "BBB- Internacional" shown as proportional arc segments. The D3 v5 code uses `pie()` to compute arc data, `arc()` for path geometry, and `scaleOrdinal()` for the color palette. A legend maps labels and percentage values, rendered via SVG rects and text elements, while data is loaded asynchronously from a JSON file using `json()`.