This interactive scatterplot displays the classic Iris flower dataset, allowing users to select which measurements appear on the X and Y axes via dropdown menus. The visualization is rendered as an SVG using D3 v6 within a React framework, with marks colored by species and an interactive color legend that fades unrelated points on hover. The code utilizes D3 scales like `scaleLinear` and `scaleOrdinal` to map data to positions and colors, with `csv` loading from a GitHub gist.