This interactive scatter plot visualizes the Iris dataset, showing petal length versus sepal width for three species of iris flowers. A static SVG renders circles for each data point, colored by species via a D3 ordinal scale. Hovering over a species label in the adjacent color legend fades out non-matching points and highlights the selected group. The implementation uses D3 scales (`scaleLinear`, `scaleOrdinal`) for axes and colors, React hooks for hover state, and renders everything as SVG elements.