This example plots sepal length against petal length for the Iris Dataset, with each flower represented as a circle. The visualization demonstrates a reusable scatter plot module composed with custom axis and labeling functions. It uses D3 v7 APIs including `scaleLinear`, `extent`, `axisLeft`, `axisBottom`, and data joins via `selectAll` and `join`. The code loads the CSV data with `fetch` and `csvParse`, then renders the plot across the full browser window, coloring points by species.