This scatter plot visualizes the Iris dataset, allowing users to compare any two measurements—sepal and petal length and width—through interactive dropdown menus. A third menu option maps the categorical species column onto either axis, positioning points discretely. The visualization uses d3.scaleLinear and d3.scalePoint for scaling, with smooth transitions via d3.transition. Data is loaded using d3.csv, and the reusable chart pattern from Towards Reusable Charts enables dynamic updates through d3.selection.join.