This scatter plot visualizes the Iris dataset, mapping sepal length and petal length on the axes while using distinct symbols to represent the three iris species. The visualization loads the CSV data asynchronously via `fetch` and `csvParse`, then renders it with `d3.scaleLinear`, `d3.scaleOrdinal`, and `d3.symbol` generators. Axis labels and a shape legend are added through modular helper functions. The plot uses d3.v7’s data join pattern, showing how shape encoding distinguishes categorical values in a quantitative scatter plot.