This scatter plot visualizes the iris dataset, mapping sepal length and petal length along the x- and y-axes, with each point’s shape encoding the species of iris. The visualization is built with D3 v7, using the `scaleLinear`, `extent`, `symbolsFill`, and `symbol` APIs to position marks and generate a shape legend. Axes and their labels are rendered via `axisLeft` and `axisBottom`, while data is fetched from a remote CSV and parsed with `csvParse`.