This visualization displays the Iris dataset as a 3D scatter plot, comparing sepal and petal measurements across different species. The first trace uses petal length as the z-axis with a colormap, while the second uses petal width, both with semi-transparent markers. The code loads the CSV data using `d3.csv`, parses it with custom `unpack` functions, and renders the plot using Plotly's `Plotly.newPlot` API with `scatter3d` traces. The layout removes all margins for a clean presentation.