This scatter plot visualizes the Iris dataset, plotting sepal length against sepal width, with each point colored by species. A color legend allows users to hover over a species to highlight corresponding data points and fade the others, aiding comparison across groups. Built with React and rendered as an SVG, the visualization uses D3 v7 APIs like `d3.csv` for data loading, `d3.scaleLinear` for axes, and `d3.scaleOrdinal` for the categorical color mapping.