This scatter plot visualizes the Iris dataset, showing sepal length against petal length, with dots colored and shaped by species. The visualization uses D3 v7’s modular API, including `scaleLinear` and `scaleOrdinal` for scales, `symbol` for generating mark paths, and `axisLeft`/`axisBottom` for axes. A custom legend with `symbolGenerator` maps each species to a distinct shape. The code fetches and parses the CSV data using `csvParse` and dynamically sizes the SVG to the viewport.