This scatter plot visualizes the relationship between flipper length, body mass, bill length, and bill depth across three penguin species (Adelie, Gentoo, and Chinstrap) from the Palmer Penguins dataset. It encodes data points as circles with fill colors distinguishing species, while also mapping bill dimensions to circle radii. Built with D3 v5 and React, the SVG uses `scaleLinear`, `extent`, `axisLeft`, and `axisBottom` to render axes, with data loaded via `d3.csv` from a GitHub gist source.