This interactive scatter plot explores the Iris dataset, letting users compare measurements by selecting different features for the x- and y-axes via drop-down menus. The visualization uses D3 v5’s `scaleLinear`, `axisBottom`, `axisLeft`, and `scaleOrdinal` to render SVG circles colored by iris species, with a custom legend. A reusable `dropDownMenu` function updates the chart on selection changes, redrawing axes and points with `transition`-free updates.