This scatter plot visualizes the Iris dataset, mapping sepal length on the x-axis, petal length on the y-axis, and encoding species by symbol shape. It uses d3.scaleLinear for axes, d3.scaleOrdinal with symbolsFill for shapes, and a custom legend showing species markers. Data is loaded via fetch as CSV and parsed with d3.csvParse, with axes and legend rendered using d3.axisLeft, d3.axisBottom, and d3.symbol.