Five fruit circles rendered in SVG respond to hover by toggling a black stroke around the selected fruit. The example cycles through data updates—removing fruits, changing a plum into a lemon, and filtering the array—while `d3.transition` animates circle radii to zero for exits. Fruit type maps to color and radius via `d3.scaleOrdinal`, and the selection state drives re-rendering through a custom `fruitBowl` function.