This interactive scatter plot visualizes the Iris dataset, allowing users to explore relationships between four flower measurements through dropdown menus that switch the X and Y axes. Points are colored by species, with a color legend that fades non-hovered points for focused comparison. Built with React and D3 v7, the visualization uses D3's `scaleLinear` for axes and `scaleOrdinal` for categorical colors, rendering points as SVG circles. The code leverages React state for user selections and D3 utility functions like `csv` to load and parse the data.