This scatter plot visualizes the Iris dataset, mapping petal length and width to the x- and y-axes while encoding species with color (skyblue, lightgreen, orange). The plot also encodes sepal length and width as the horizontal and vertical radii of each circular mark. The visualization uses D3 v6 APIs including `d3.csv`, `scaleLinear`, `extent`, `axisLeft`, and `axisBottom` to load and scale data, draw axes, and render circles. A legend distinguishes the three species. The SVG renders directly to the browser window, sized to the viewport.