This scatter plot visualizes the Iris dataset, mapping sepal length against petal length and encoding species with distinct marker shapes. It loads data from a CSV file hosted on GitHub, parsing and converting numeric fields. The visualization uses D3 v7 APIs including `scaleLinear`, `scaleOrdinal`, `symbolsFill`, `axisLeft`, and `axisBottom` to construct the plot, axes, and a custom shape legend. The chart updates dynamically as data loads, demonstrating modular ES6 imports and a state-based rendering pattern.