A scatter plot of the Iris dataset shows petal length versus sepal width, with points colored by species. Hovering over a species in the color legend dims all other points and highlights only that species. The visualization uses React components with D3 scales from `d3.scaleLinear` and `d3.scaleOrdinal`, rendering as SVG circles and axis ticks. Data is loaded via `d3.csv` from a GitHub Gist.