This bubble chart visualizes the Iris dataset, showing sepal length on the x-axis, sepal width on the y-axis, and petal length controlling bubble size, with colors distinguishing the three species. Built with D3.js v7, it uses `d3.csv` to load data, `scaleLinear` for axes and sizing, and SVG circles for rendering. Interactive tooltips appear on mouseover, displaying the species and all four flower measurements, while hovering increases bubble opacity and stroke width.