An interactive scatter plot of the Iris dataset rendered in SVG using React and D3, comparing petal length against sepal width with points colored by species via `d3.scaleOrdinal`. A custom React color legend component displays the three species, and hovering over a legend entry fades non-matching points to 20% opacity while re-rendering only the selected species highlights on top. Axes are generated with `d3.scaleLinear`, `d3.extent`, and `d3.format`, with data loaded asynchronously through D3’s `csv` parser.