Animated fruit bowl circles transition smoothly between states as apples are eaten or replaced by lemons. Using D3 v5 with SVG rendering, circles enter and exit by animating their radius from zero to its final value, while updates transition both position and size. The d3 selection join pattern with object constancy via id tracks individual fruits across data changes. Color and radius are mapped through d3.scaleOrdinal with transition durations of one second.