This interactive scatterplot displays the Iris flower dataset, plotting petal length against sepal width. Each flower is represented by a circle colored by species, with a legend allowing users to hover and highlight a specific species while fading the others. Built with React and D3 v5, the visualization uses `d3.scaleLinear` and `d3.scaleOrdinal` for scales, and renders as SVG. Hovering over a legend item triggers a filter (`data.filter`) to emphasize the selected species, while tooltips via `<title>` show precise values.