Five circles representing apples enter at equal intervals and transition from radius zero. The D3 general update pattern uses a key function on fruit IDs, with `scaleOrdinal` mapping fruit types to color and radius. Over timed intervals, the array mutates: an apple exits, an apple becomes a lemon, and another apple filters out, each change animating via `transition().duration(1000)` on enter, update, and exit selections. SVG circles render with SVG transitions.