This stacked bar chart displays aggregate sepal measurements for three Iris species, showing sepal length and sepal width contributions for setosa, versicolor, and virginica. Using D3 v7, the visualization applies `d3.stack()` to layer the metrics, `d3.scaleBand` for categorical spacing, and `d3.scaleLinear` for the value axis. Hover interactions reveal species-specific values via a tooltip, with the CSV data rendered as SVG bars colored blue and orange.