This example visualizes the classic Iris dataset as a scatter plot, using sepal length on the x-axis and petal length on the y-axis. Each point’s color encodes the flower species, with a categorical color legend identifying setosa, versicolor, and virginica. The visualization is built using D3.js, leveraging `scaleLinear` for the axes, `scaleOrdinal` with `schemeCategory10` for the color mapping, and the `selection.join` API for declarative SVG creation. A custom `axes` and `colorLegend` module handle the chart’s annotations.