This interactive scatter plot visualizes the Iris dataset, mapping sepal length against petal length and distinguishing species by shape (circles, squares, and other symbols). It uses D3 v7’s `scaleLinear`, `scaleOrdinal`, `symbol`, and `csvParse` APIs to load and transform data, with `axisLeft` and `axisBottom` for axes. The plot includes a custom shape legend and updates dynamically as data loads, rendered in an SVG canvas sized to the window.