This example displays the classic Iris dataset as a scatter plot, mapping sepal length against petal length and encoding species with distinct symbol shapes. It renders points as scalable vector graphics using D3.js version 7, leveraging `scaleLinear`, `scaleOrdinal`, and `symbol` generators. The visualization includes labeled axes and a custom shape legend built with local ES6 modules. Data is loaded asynchronously from a remote CSV and parsed with `csvParse` before rendering.