This example visualizes the Iris flower data set with parallel coordinates, encoding each specimen as a polyline across four quantitative dimensions. The lines are colored by species via `d3.scale.ordinal`, and users can drag any axis to reorder dimensions, with animated transitions using `d3.behavior.drag`. It renders in SVG with axes from `d3.svg.axis` and includes a legend of flower classes. Data loads from a remote CSV, and axis labels are rendered with text elements.