This interactive bubble chart visualizes the Iris dataset, plotting sepal length and width for three flower species, with bubble size encoding petal length and color distinguishing species. D3.js v7 handles data loading via `d3.csv`, scales with `d3.scaleLinear` and `d3.scaleOrdinal`, and renders SVG circles. Hover interactions trigger tooltips showing species and measurement details. A categorical legend identifies species by color.