This interactive scatter plot visualizes the Iris dataset, showing petal length against sepal width with points colored by species. Hovering over a species name in the ordinal color legend highlights only the matching marks and fades others. Built with React and D3 v5, it uses `scaleLinear` for axes, `scaleOrdinal` for colors, and custom SVG components for rendering. Data loads via `d3.csv` and interactivity relies on React state for hover handling.