A scatter plot of the Iris dataset displays sepal length versus petal length, with points shaped by species. The visualization uses D3 v7's `scaleLinear`, `scaleOrdinal`, `symbol`, and `symbolsFill` to map data values and render distinct mark types, while a custom legend explains the shapes. Axes are drawn with `axisLeft` and `axisBottom`. Data is loaded asynchronously from a GitHub-hosted CSV and parsed with `csvParse`.