This 3D scatter plot visualizes the Iris flower dataset, mapping calyx length and width against corolla length and width as separate traces. The visualization uses Plotly.js to render interactive 3D markers with adjustable opacity and size, with data loaded asynchronously via D3.js (v3) CSV parsing from a GitHub-hosted dataset. Two traces distinguish the different corolla measurements, while the layout removes all margins for a full-viewport presentation. The code utilizes Plotly.newPlot to render the chart inside a designated div, combining D3's data-handling capabilities with Plotly's 3D rendering engine.