This interactive scatter plot visualizes the classic Iris dataset, comparing sepal length against petal length across three iris species. Each flower is represented as a distinct symbol shape (circle, triangle, and square) using D3’s `symbol` generator, with a custom legend showing the species mapping. The chart is built with reusable D3 modules for axes, scatter plot rendering, and a shape legend, leveraging `scaleLinear`, `scaleOrdinal`, and `extent`. Data is loaded asynchronously from a CSV file and parsed with `csvParse`. The visualization responds dynamically to the browser window size.