This SVG bubble chart, rendered with D3 v7, visualizes the Iris dataset by plotting sepal length against sepal width. Each circle's radius encodes petal length, while its color distinguishes the three species using a categorical scale. The code loads data from a remote CSV, employs `d3.scaleLinear` and `d3.scaleOrdinal` for positioning and coloring, and provides interactive tooltips on hover. A static legend identifies species, and the visualization supports animation through D3's transition methods.