This scatter plot of Fisher’s iris dataset uses D3 v7 to visualize sepal length against petal length, with species encoded through distinct symbol shapes instead of colors. The code employs `scaleLinear` for axes, `scaleOrdinal` with `symbolsFill` for shape mapping, and a custom `shapeLegend` to display the species key. Data loads from a remote CSV via `fetch` and `csvParse` before rendering.