This interactive scatter plot visualizes the Iris dataset, displaying petal length against sepal width for three iris species. The React and D3 v5 application renders SVG circles whose colors encode species, with a color legend that highlights the corresponding data points when hovered over. The visualization uses `scaleLinear` for the axes, `scaleOrdinal` for the color mapping, and an interactive `ColorLegend` component that fades non-hovered marks via opacity changes.