This scatter plot visualizes the Iris dataset, showing petal length against sepal length, with each point’s shape encoding the flower species (setosa, versicolor, virginica). The plot uses D3’s `scaleLinear` for axes and `scaleOrdinal` with `symbolCircle`, `symbolCross`, and `symbolDiamond` to differentiate species. A custom `shapeLegend` displays these symbols, while the axes are labeled via `axisBottom` and `axisLeft`. Data is loaded from a remote CSV.