This interactive bubble chart visualizes the Iris dataset, showing the correlation between sepal length, sepal width, and petal length. Each circle's x/y position encodes sepal length and width, while its radius encodes petal length, and its color distinguishes the three iris species. The D3.js chart uses `d3.scaleLinear` for axes and bubble size, `d3.scaleOrdinal` with `d3.interpolateTurbo` for species colors, and includes a legend and interactive tooltips.