This example visualizes the classic Iris dataset using parallel coordinate plots, showing four flower measurements across vertical axes with polylines colored by species. Users can hover over lines to highlight all flowers of the same class while dimming others, or drag axis labels to reorder dimensions. The implementation uses d3.csv for data loading, d3.scaleLinear and d3.scalePoint for scales, d3.line for path generation, d3.axisLeft for axes, and d3.drag for interactive axis repositioning. Transitions animate the line redrawing during drag operations.