This example presents an interactive scatter plot of Fisher’s Iris dataset, letting users switch which flower measurements appear on the x- and y-axes via two dropdown menus. React manages the selected attributes and re-renders the SVG visualization, which is built with D3 scales (e.g., `scaleLinear`) and custom React components for axes and marks. Hovering over a circle reveals a tooltip with the formatted value of the x-axis variable for that point.