This interactive bubble chart visualizes the Iris dataset, plotting sepal length against sepal width for three species of iris flowers. Each circle's size encodes petal length, while its color distinguishes the species, with a legend identifying each group. The visualization uses D3.js (v7) to render SVG elements, with tooltips displaying exact measurements on hover. The code employs `d3.scaleLinear` for axes and bubble sizing, `d3.scaleOrdinal` for species colors, and `.on()` event handlers for interactive tooltip behavior.