This interactive scatterplot demonstrates relationships among Iris flower measurements, with dropdown menus that let users choose which attributes appear on the x and y axes. Two React Dropdown components update React state to trigger re-renders. The visualization uses D3’s `scaleLinear` and `extent` functions to map data to SVG coordinates, with custom `AxisBottom` and `AxisLeft` components rendering tick marks and labels. Circle marks include tooltips showing formatted values, while axis labels rotate and reposition dynamically. Data loads from a CSV URL using `useEffect` and `d3.csv`.