This example visualizes the Iris dataset with a scatter plot of petal length against petal width, coloring each point by species (setosa, versicolor, or virginica). It uses D3 v6’s `csv`, `scaleLinear`, `extent`, `axisLeft`, `axisBottom`, and `select` to load data, map scales, and render axes, while circles are drawn with SVG attributes. The plot is sized to the window and displays axis labels for both petal and sepal measurements, with a legend implied through color coding.