A scatter plot of the penguin dataset shows body mass versus flipper length, with each point colored by species (Adelie, Gentoo, or Chinstrap). The plot also encodes bill length and bill depth through each circle’s horizontal and vertical radii, blurring the boundary between scatter and bubble chart. The visualization is built with D3 v5, using `d3.csv`, `d3.scaleLinear`, and `d3.axisLeft`/`axisBottom` to render an SVG. Data is loaded from a GitHub-hosted CSV, with axes labeled and a title included.