A scatter plot displays the relationship between penguin flipper length and body mass, with points colored by species: blue for Adelie, red for Chinstrap, and yellow for Gentoo. The D3 v5 code loads CSV data via `d3.csv`, scales positions with `scaleLinear`, and renders SVG circles. Axes are generated using `axisLeft` and `axisBottom`, with custom font styling and axis labels for clarity.