This interactive scatter plot visualizes the Iris dataset, mapping petal length on the x-axis, sepal width on the y-axis, and coloring each point by species. Hovering over a species in the color legend highlights only that species' data points while fading others to 20% opacity. Built with React and D3 v5, it uses `scaleLinear`, `scaleOrdinal`, and `extent` from d3 for scales, with SVG circles rendered from the dataset loaded via `csv`.