This scatter plot visualizes the Iris dataset, mapping sepal length against petal length and encoding species through distinct point shapes. The visualization uses a custom D3.js v7 implementation with modular functions for axes and legend rendering, employing `scaleLinear`, `scaleOrdinal`, and `symbolsFill` for proportional scaling and shape encoding. The code imports specific APIs including `axisLeft`, `axisBottom`, and `symbol` from D3, while fetching data from a GitHub-hosted CSV file. A shape legend positioned at the right displays the species categories with sample symbols.