This scatter plot visualizes the Iris dataset, mapping sepal length on the x-axis and petal length on the y-axis, with species encoded by distinct d3 symbol shapes and a custom legend. The visualization uses d3.csvParse to load the data from a GitHub repository and d3.scaleLinear for the axes. Points are rendered as d3 symbols via symbolGenerator with a fixed size, while the shape legend and axes are built using modular D3 functions that leverage joins and d3.axisBottom/axisLeft.