Circles representing apples animate into a row, then smoothly transition as fruit is eaten or changed. The example demonstrates animated data joins using D3 v5 selections, merging enter and update sets and applying `transition().duration()` to shift positions and radii. A time-driven script mutates the fruit array, swapping an apple for a lemon and filtering out elements, while exit transitions shrink circles to zero before removal. The SVG rendering uses ordinal scales for color and radius, keyed by unique fruit IDs.