This scatter plot visualizes the Iris dataset, showing sepal and petal measurements for three iris species. Users can select which measurement appears on the x- and y-axes via dropdown menus, with each species color-coded. The visualization uses d3.scaleLinear for axes, d3.scaleOrdinal for colors, and d3.axisBottom/axisLeft for gridlines. Data loads from a CSV file using d3.csv, and circles are rendered as SVG elements.