Five circles representing fruit transition smoothly as they are added, updated, and removed. The example demonstrates D3's data join with enter, update, and exit selections. Using d3.transition with a one-second duration, each circle's radius, fill color, and x-position animate via attribute interpolation. The code uses scaleOrdinal for categorical color and radius mapping, and random IDs to track elements as apples are replaced by lemons and removed over timed intervals.