This interactive scatterplot displays the Iris flower dataset, letting users compare four measurements (sepal and petal length and width) by selecting attributes for the x- and y-axes via ReactDropdown. Points are colored by species using d3.scaleOrdinal, with a legend that highlights one class on hover. The visualization uses React and d3.v5, rendering circles as SVG marks with d3.scaleLinear axes. Hovering over legend items filters the plotted circles’ opacity, while built-in tooltips show exact values.