This scatter plot visualizes the Iris dataset, showing sepal length against petal length, with points colored and shaped according to species. The visualization uses D3 v7’s `scaleLinear`, `scaleOrdinal`, `symbol` generator, and custom `axes` and `shapeLegend` modules to render the chart and its legend. Data is fetched from a raw CSV file on GitHub and parsed with `csvParse`. The plot updates responsively to the browser window size and includes labeled axes and a legend showing the three species categories.