A scatter plot of the Iris dataset with interactive dropdown menus for selecting which flower measurements to plot on the x and y axes. The menus allow users to switch between sepal length, sepal width, petal length, petal width, and species for either axis, with axis labels updating accordingly. The visualization uses D3's `scaleLinear` for scaling, React's `useState` for managing selections, and renders an SVG with tick marks, axis labels, and circular marks.