A parallel coordinates plot displays the four numerical measurements of the Iris dataset—sepal length, sepal width, petal length, and petal width—as vertical axes, with each flower represented by a polyline connecting its values. The lines are colored by species (red, blue, green) with 30% opacity to reveal overlapping patterns. Built with D3.js, the visualization uses `d3.scalePoint` for axis positioning, `d3.scaleLinear` for value scaling, and `d3.line` to generate the polylines. A static SVG rendering, it includes a title and a legend with colored squares and species names, and loads data from a CSV file via `d3.csv`.