A scatter plot of the Iris dataset lets users choose which of the four measurements—sepal length, sepal width, petal length, or petal width—to map to the x- and y-axes via two React dropdown menus. Built with React and ReactDOM, the visualization renders as an SVG using d3.scaleLinear for axes and d3.extent to set domains. Points are drawn as circles with tooltips, and the code uses the d3.csv loader to fetch and parse the data from a GitHub gist.