This example displays a scatter plot of Iris flower measurements, showing sepal length against petal length for three species. The visualization uses distinct symbols for each species, with a shape legend positioned in the upper right corner to identify the categories. Built with D3 v7, the code imports specific modules such as `scaleLinear`, `scaleOrdinal`, `symbol`, and `symbolsFill` for scaling and symbol generation. The plot loads data from a CSV file hosted on GitHub, parsing it with `csvParse` and converting numeric fields before rendering. Axes and labels are created using reusable axis functions.