Five fruit circles enter and animate from a zero radius, then exit and re-enter as their data array mutates over timed intervals, demonstrating the general update pattern. The React-wrapped example uses d3 v5’s `selection.data` with key functions, `transition().duration()`, and `merge()` to handle enter, update, and exit sets. Ordinal scales map fruit types to colors and radii, with SVG rendering driven by d3.select and attribute tweens.