This example visualizes the Palmer Penguins dataset as a scatter plot, mapping flipper length on the x-axis and body mass on the y-axis. Each point is colored by penguin species (Adelie, Gentoo, or Chinstrap) and its radius visually encodes bill dimensions. Built with D3 v5, it uses `d3.csv` to fetch the remote dataset, `d3.scaleLinear` and `d3.extent` for axes, and `d3.axisLeft` and `d3.axisBottom` for labeled scales. The plot is rendered as SVG circles positioned using `d3.select` and data-driven joins.