This bubble chart visualizes the correlation between sepal length, sepal width, and petal length in the Iris dataset. Each circle’s position maps sepal dimensions, its radius encodes petal length, and color distinguishes the three species (setosa, versicolor, virginica). Hovering reveals a tooltip with species and petal length. The visualization uses D3 v7 with SVG rendering, `d3.scaleLinear` for axes and bubble size, `d3.scaleOrdinal` for categorical colors, and interactive mouse events for tooltip display. A legend identifies species colors.