This visualization displays the classic Iris dataset, plotting sepal length against petal length to compare three species. Each point is rendered as a distinct SVG path shape—circles, squares, and triangles—indicating setosa, versicolor, and virginica, with a legend generated by the custom `shapeLegend` module. The chart uses D3 v7's `scaleLinear` and `scaleOrdinal` scales, along with `d3.symbol` to produce the marks, and `renderAxes` to draw labeled axes.