This example visualizes the relationship between flipper length and body mass for three penguin species, with each species encoded by color. The scatter plot uses D3’s `scaleLinear` and `extent` to map data values to SVG circle positions, with axes generated via `axisLeft` and `axisBottom`. Data is loaded from a CSV using `d3.csv`, and the chart also encodes culmen length redundantly through circle `rx` and `ry` attributes, though the radius remains constant. The visualization fills the window using `window.innerWidth` and `window.innerHeight`, with custom font styling for axis labels.