An interactive scatterplot of the Iris dataset displays measurements of sepal width, sepal length, petal width, and petal length as points. Users select which measurements appear on the X and Y axes via two dropdown menus, with axis labels updating accordingly. Built with React and D3 v6, the visualization uses `d3.scaleLinear` for axes, `d3.extent` for domains, and renders SVG circles, lines, and text. Data is loaded from a CSV using `d3.csv`, and components for axes, marks, and dropdowns are modularized into separate React files.