This interactive scatter plot explores the Iris dataset, allowing users to select which flower measurements appear on the x- and y-axes via two dropdown menus. Built with React and D3 v5, it renders SVG circles whose positions are scaled using `scaleLinear` and `extent`. The x-axis tick labels are formatted with `format('.1f')`, while each circle includes a `<title>` element showing the precise x-value as a tooltip.