This reusable D3 chart displays the classic Iris dataset, mapping petal and sepal measurements. Each flower species (setosa, versicolor, virginica) is distinguished by both color and symbol shape. The code uses d3.csv for data loading, scaleLinear for positioning and sizing, scaleOrdinal for symbol types, and d3.axisBottom and axisLeft for axes. Rendering is SVG via d3.select and .join, with symbols generated by d3.symbol.