This is a scatter plot of the Iris dataset, showing sepal length against petal length, with each flower species represented by a translucent circle. The visualization is built with D3 v7, using `d3.csv` to load data, `scaleLinear` and `extent` to map values, and `axisLeft`/`axisBottom` for the axes. Circles are rendered as SVG elements with a fill opacity of 0.5. The example demonstrates a modular structure with separate files for data fetching, axis rendering, and the main visualization logic.