This visualization displays Fisher’s Iris dataset as parallel coordinate plots, with each axis representing a floral measurement and each polyline colored by iris species (setosa, versicolor, virginica) via a categorical scale. Users can drag axis labels to reorder dimensions, which interactively repositions the paths. The D3 v3 code uses `d3.svg.line` and `d3.svg.axis` for rendering, with SVG paths for foreground and background strokes, plus `d3.behavior.drag` to enable axis reordering and smooth transition animations.