This scatter plot visualizes the Iris dataset, mapping sepal length on the x-axis, petal length on the y-axis, and encoding species using different marker shapes. The visualization includes axes with labels and a shape legend to identify species categories. Built with D3 v7, the code uses `scaleLinear`, `scaleOrdinal`, `symbolsFill`, and `symbol` APIs to generate the plot. The implementation relies on a custom `axes.js` module for axis rendering and a `shapeLegend.js` module for the legend, with data loaded asynchronously from a CSV file.