This 3D scatter plot visualizes the Iris dataset, plotting sepal length, sepal width, and petal length for one trace, and sepal length, sepal width, and petal width for another, with markers colored and styled distinctly. The visualization uses Plotly’s `scatter3d` type via `Plotly.newPlot` to render the interactive chart inside a DIV. Data is loaded asynchronously with D3’s `d3.csv`, fetching the Iris dataset from a GitHub gist, and then unpacking the relevant columns for each trace.