A scatter plot of Fisher's Iris dataset displays sepal length against petal length, with points colored by species via a categorical color scale and a legend labeling each species. The visualization uses D3 v7’s `scaleLinear`, `scaleOrdinal`, and `schemeCategory10` to map data, while `selection.join` binds circles for each flower. Axes and legend are built with custom modules using `axisBottom`, `axisLeft`, and d3-scale-chromatic’s ColorBrewer schemes. Data is loaded asynchronously from a CSV file and parsed with `csvParse`.