This scatter plot visualizes the Iris dataset, showing petal length against sepal length with points colored and shaped by species. Points are rendered as SVG path marks, with the x- and y-axes labeled via d3.axisBottom and d3.axisLeft. A custom legend maps species names to distinct fill symbols using d3.scaleOrdinal and d3.symbolsFill. The chart uses d3.scaleLinear for both axes and d3.extent to compute domains, with data fetched from a remote CSV and parsed using d3.csvParse.