This example demonstrates a scatter plot of the Iris dataset, mapping sepal length to the x-axis, petal length to the y-axis, and encoding species with distinct shapes. The visualization uses D3's `scaleLinear`, `scaleOrdinal`, `symbolsFill`, and `symbol` APIs to render the data points, while `axisLeft` and `axisBottom` from D3 handle the axes. A custom shape legend is built using the `symbol()` generator. The data is loaded asynchronously via `fetch` from a remote CSV file, then parsed with `csvParse` before being rendered.