This interactive scatter plot visualizes the Iris dataset, letting users explore relationships between four numeric flower measurements. The visualization uses D3 v5 with SVG rendering, mapping flower species to semi-transparent red, green, and blue circles. Dropdown menus built with D3 selection methods allow users to dynamically switch which measurement appears on each axis, triggering a full re-render of the chart through the `render` function. The chart includes labeled axes, a title, and a manual legend for the three Iris species categories.