This interactive scatter plot visualizes the Iris flower dataset, allowing users to explore relationships between four physical measurements (sepal and petal dimensions) by selecting which variable appears on each axis via dropdown menus. D3.scaleLinear maps the numeric attributes to screen coordinates, while d3.scaleOrdinal assigns categorical colors to the three Iris species, displayed in a custom color legend rendered as SVG circles. The visualization uses React hooks to manage state, D3’s csv parser to load the data, and SVG marks with tooltips for each point.