This interactive scatter plot visualizes the Iris dataset, mapping sepal length against petal length. Different species are represented by distinct D3 symbols, such as circles and crosses, with a legend annotating each shape. Built with D3 v7, it uses `csvParse` to load data and `scaleLinear` for axes. The code generates the plot using reusable modules for rendering axes (`axisLeft`, `axisBottom`) and the shape legend, with rendering triggered by a simple state-based update cycle.