This interactive scatter plot visualizes the Iris flower dataset, allowing users to select any combination of sepal and petal measurements for the x- and y-axes via dropdown menus and a plot button. Each point is colored by species—setosa in red, versicolor in blue, and virginica in green—using a predefined color mapping. The visualization is built with D3.js v7, using `d3.scaleLinear` for axis scaling and `d3.csv` to load the data from an external URL. The plot renders as SVG circles within a fixed 550×550 canvas.