This interactive scatter plot displays the classic Iris dataset, allowing the user to switch which of the four flower measurements (sepal and petal length and width) are mapped to the X and Y axes via dropdown menus. Built with D3 v7, it uses `scaleLinear` for axes, `transition` for animated point movement, and `axisLeft`/`axisBottom` for tick marks. A custom `menu` module manages the dropdowns, using `dispatch` to trigger updates that re-draw the SVG circles with a staggered delay.