This interactive parallel coordinate plot visualizes the classic Iris dataset, with each flower’s measurements drawn as a polyline across four vertical axes. Users can drag the labeled buttons—sepal width, sepal length, petal width, and petal length—to reorder the dimensions, which rebuilds the chart using `d3.scaleLinear`, `d3.scalePoint`, and `d3.line`. Paths are color-coded by species via CSS classes, rendering in SVG with data loaded from an external CSV file.