This scatter plot visualizes the Iris dataset, showing sepal length against petal length with points colored and shaped by species. The visualization uses D3 v7 with multiple modules: `scaleLinear` for coordinate mapping, `scaleOrdinal` with `schemeCategory10` for color encoding, and `symbol` for shape differentiation. A custom shape legend explains the species markers, while standard axes with labels are rendered via `axisLeft` and `axisBottom`. Data is loaded as CSV from GitHub and parsed with `csvParse`, then numeric fields are converted before rendering.