This interactive scatter plot visualizes the Palmer Penguins dataset, mapping flipper length and bill length with points colored by species. Built with React and D3 v5, the visualization renders as an SVG with animated transitions. The code uses `d3.csv` to load data and `d3.scaleLinear` for axes, with `d3.axisLeft` and `d3.axisBottom` for chart scaffolding. A second implementation adds user controls through a D3 menu system, enabling dynamic re-mapping of axes.