This scatter plot visualizes the Iris dataset, mapping petal length and width as the x- and y-axes, with each point colored by species (setosa, versicolor, or virginica). D3 v6 loads the CSV via `d3.csv`, and uses `d3.scaleLinear`, `d3.extent`, and `d3.axisLeft`/`d3.axisBottom` to render axes. Circles are drawn with SVG, and their radii are fixed, but the `rx` and `ry` attributes are set to sepal length and width, creating elliptical markers. Data is sourced from a GitHub-hosted CSV file.