This bubble chart visualizes correlations among sepal length, sepal width, and petal length for three iris species, with petal length encoded as bubble size and species color-coded using a categorical scale built with `d3.scaleOrdinal` and `d3.interpolateTurbo`. It loads data from `iris.csv` and renders SVG circles positioned by linear scales. Interactive tooltips highlight species and petal length on mouseover, while a legend identifies color assignments.