This interactive scatter plot displays the Iris dataset, mapping petal length against sepal width with species indicated by color. The React-based visualization uses D3.js scales (scaleLinear, scaleOrdinal) and SVG rendering. Users can hover over the color legend to highlight points from a specific species while dimming others, achieved through React state management (useState) that toggles opacity values on the marks and legend items. The data loads asynchronously via D3's csv parser.