A scatter plot displays the Iris dataset, with points colored by species (setosa, versicolor, virginica) via an ordinal color scale. Users select the x- and y-axis variables from four measurement options via dropdown menus. The visualization uses D3 v5's `scaleLinear`, `axisBottom`, and `axisLeft` APIs, with circles rendered as SVG elements. A legend identifies species colors, while axis labels and a title update dynamically with each selection.