This interactive scatter plot visualizes the Iris dataset, mapping sepal length against petal length and using distinct symbols to represent the three iris species. The D3.js v7 code builds the visualization entirely with modular functions, including `scaleLinear` and `scaleOrdinal` for scales, `symbol` for generating shapes, and `csvParse` to load the data from a GitHub-hosted CSV file. Axis and shape legend components are rendered via `axisLeft`, `axisBottom`, and custom legend logic, with the chart redrawing responsively to the full window size.