An interactive scatter plot of the Iris dataset lets users explore relationships between sepal and petal measurements by choosing which variables appear on the x- and y-axes from two dropdown menus. Points are colored by iris species using d3.scaleOrdinal and schemeCategory10, with a corresponding color legend generated by a custom colorLegend module. The visualization is built with D3 v5, rendering SVG circles via a reusable scatterPlot function that updates scales and axes when the menu selections change.