This interactive scatter plot visualizes the Iris dataset, displaying sepal length against petal length. Points are color-coded by species using a shape-based legend, with axes labeled accordingly. Built with D3 v7, the visualization dynamically loads CSV data from GitHub and uses `scaleLinear`, `scaleOrdinal`, `symbolsFill`, and `symbol` APIs for scaling and rendering. The code structure separates chart components into modular functions for axes, shape legends, and the main scatter plot, with a reactive state management pattern handling asynchronous data fetching and re-rendering on updates.