This interactive scatter plot displays the Iris dataset, allowing users to choose which numeric measurements appear on the x- and y-axes via dropdown menus. The visualization uses d3.csv to load data, d3.scaleLinear and d3.extent for scaling, and d3.axisBottom/axisLeft with tick marks. Circles are colored by iris species (setosa, versicolor, virginica) through CSS classes, with a legend overlay. The code utilizes d3-selection and d3-transition APIs within an SVG rendering approach.