This example visualizes the Iris dataset as a scatterplot, with interactive dropdown menus allowing viewers to select which flower attributes appear on the X and Y axes. Built with React and D3.js v5, it uses `d3.scaleLinear` and `d3.extent` to map data values to SVG coordinates, with axes rendered as custom React components. Data loads asynchronously via `d3.csv`, and hover tooltips display formatted values using SVG `<title>` elements. The interface is styled with the Poppins font and the react-dropdown library.