A reusable, animated D3 scatterplot displays the classic Iris dataset, letting users switch the x-axis among quantitative measurements and the categorical species column via two drop-down menus. Rendered as SVG, the visualization uses D3 scales, axes, and symbols to plot points colored by species. Changes trigger a smooth 2-second transition that repositions data points and updates the relevant axis, demonstrating a modular menu component built with d3.dispatch.