This scatter plot visualizes the Iris dataset, showing sepal length against petal length for three species. Each species is represented by a distinct symbol shape, with a legend mapping species to shapes. The visualization uses d3.scaleLinear to map data values to coordinates, d3.scaleOrdinal with symbolsFill for shape encoding, and custom axes and legend components. Data is loaded via fetch and parsed using d3.csvParse, then rendered with d3-selection and d3-symbol APIs.