This interactive scatter plot visualizes the Iris dataset, showing sepal length against petal length while using distinct filled symbols to encode the three iris species. The chart is built with D3 v7, using `scaleLinear` for the axes, `scaleOrdinal` with `symbolsFill` for the shape encoding, and `symbol()` to generate the custom marker paths. A shape legend, created with `shapeLegend`, labels the species categories, while the data is fetched from a remote CSV and parsed with `csvParse`.