This scatter plot visualizes the relationship between sepal length and petal length in the Iris dataset, with each point's shape indicating the species. The visualization uses D3 v7's modular APIs including scaleLinear, scaleOrdinal, symbolsFill, and symbol for generating the scatter marks. Axes are rendered with axisLeft and axisBottom, while a custom shape legend maps species to distinct symbol types. The data is loaded from a GitHub-hosted CSV file and parsed using csvParse, with numeric fields converted from strings.