This example presents the classic Iris dataset as an interactive scatter plot embedded in a full-screen SVG. Two dropdown menus let viewers dynamically switch the variables mapped to the x and y axes, choosing among the four quantitative measurements or the categorical species label. The visualization is built with D3 v6, using the `select` API for declarative DOM manipulation and `transition` to animate the movement of the data points, which reposition with a staggered delay to their new coordinates. The menus themselves are constructed using a reusable JavaScript component pattern, demonstrating a modular approach to building interactive charts.