This reusable D3 scatterplot displays the Iris dataset, plotting petal width against sepal length with points colored by species. The visualization uses D3's `scaleLinear`, `scaleOrdinal`, `axisLeft`, `axisBottom`, `symbols`, and `symbol` APIs to generate scalable vector graphics (SVG) paths as scatterplot marks, with axis labels rendered as rotated text. Data is loaded asynchronously from a remote CSV file using `d3.csv`, and the plot is fully configurable through a fluent interface that accepts dimensions, margins, and value accessor functions.