This interactive scatter plot lets users explore the Iris dataset, switching both axes between four quantitative measurements and the categorical species attribute. The D3.js code uses `scaleLinear` and `scalePoint` to map values, with dropdown menus built via a custom `menu` component to trigger updates. Circles animate into position over one second using `transition` with staggered delays, while axes smoothly transition to reflect new scales. SVG rendering and a fixed overlay menu provide the interface.