This interactive D3.js bubble chart visualizes the classic Iris dataset, plotting sepal length on the x-axis and sepal width on the y-axis. Each circle’s radius encodes petal length, while its fill color corresponds to the categorical attribute of the flower species. The visualization uses `d3.csv` to load the data, builds a linear scale for both axes and radius, and applies `d3.scaleOrdinal` for color mapping. The chart is rendered as SVG with axes, labels, and semi-transparent circles, providing a clear multi-dimensional view of the dataset’s measurements.