This interactive scatter plot visualizes the Iris dataset, showing relationships between flower measurements selected via dropdown menus. A color legend on the right highlights points by species, dimming all other data when a species is hovered. Built with React and D3 v7, the visualization uses d3.scaleLinear for axes, d3.scaleOrdinal for categorical colors, and renders SVG circles with tooltips. The dataset is loaded as CSV and parsed into numeric values for plotting.