This interactive scatter plot explores the classic Iris dataset, visualizing measurements of sepal length, width, and petal length, width for three iris species. Users select which measurements to compare on the x- and y-axes via dropdown menus and a confirm button. The visualization updates with animated transitions, using D3 v5's `scaleLinear`, `axisBottom`, `axisLeft`, and `transition` APIs to render SVG circles colored by species. Axes and gridlines adjust automatically to the selected data ranges, and a title reflects the current comparison.