This interactive scatter plot visualizes the Iris dataset, showing how flower measurements correlate by plotting each specimen as a translucent red circle. Users can dynamically select which measurement—sepal or petal length or width—appears on the X and Y axes via dropdown menus. The visualization is built with D3.js v5, using `d3.scaleLinear`, `d3.axisBottom`, `d3.axisLeft`, and SVG rendering, with a smooth 1000-millisecond transition animation (`transition().duration(1000)`) that moves circles to their new positions when axes change.