This scatter plot visualizes the Iris dataset, showing sepal length against petal length for different flower species. The D3.js v7 code uses `scaleLinear` for both axes, `scaleOrdinal` with `symbolsFill` to assign distinct shapes to each species, and a custom legend showing the shape-to-species mapping. Data loads asynchronously from a GitHub-hosted CSV file using `csvParse`, with axes generated via `axisLeft` and `axisBottom`.