This scatter plot displays sepal length against petal length for Iris flowers, with each species represented by a distinct symbol from a shape legend. The visualization uses D3 v7’s `scaleLinear` for axes, `scaleOrdinal` and `symbolsFill` for shape encoding, and `symbol()` to generate the mark paths. Data is fetched from a GitHub-hosted CSV and parsed with `csvParse`, while axes and legend are built using the custom `axes` and `shapeLegend` modules.