This example visualizes the classic Iris dataset as an interactive 3-D scatter plot, mapping sepal length, sepal width, and petal length onto the x, y, and z axes. Points are colored by species—setosa, versicolor, and virginica—using a custom Plotly colorscale. The visualization is built with Plotly’s `scatter3d` trace type, which renders via WebGL, and uses D3 to load and parse the CSV data. Each axis is labeled and given a distinct background color for clarity.