This scatter plot visualizes the Iris dataset, mapping sepal length and petal length on the x- and y-axes, with species encoded by point shape. It uses D3 v7's `scaleLinear`, `scaleOrdinal`, and `symbolsFill` to create the visualization, rendering SVG paths via `symbol()`. Data loads from a CSV via `csvParse`, with axes and a shape legend generated using `axisLeft`, `axisBottom`, and custom legend code.