Three side-by-side correlation matrices visualize the relationships among physical measurements and age rings in the Abalone dataset, split by sex into male, female, and infant groups. Each matrix uses a red-blue sequential color scale to represent correlation values from -1 to 1, with hover tooltips displaying exact coefficients. The visualization is built with D3 v6, using `d3.scaleBand` for axes, `d3.scaleSequential` with `d3.interpolateRdBu` for coloring, and the matrices are rendered as SVG rectangles.