This scatter plot visualizes the Iris dataset, showing sepal length on the x-axis and petal length on the y-axis, with each point's shape encoding the species. It uses D3's `scaleLinear`, `scaleOrdinal`, and `symbolsFill` to map data to scales and shapes, and `axes` to draw labeled axes. A custom legend displays the shape-to-species mapping. Data is fetched from a remote CSV and parsed via `csvParse`.