This scatter plot visualizes the relationship between two chemical properties—fixed acidity and volatile acidity—of red wines from the Wine Quality dataset, with points colored by quality rating. The D3.js v7 code uses `scaleLinear` for axis scaling and `scaleOrdinal` with a category color scheme to map quality values. The interactive visualization loads data from the UCI Machine Learning Repository via `fetch`, parses it with `csvParse`, and renders circles at scaled positions within an SVG canvas sized to the browser window.