This example demonstrates the general update pattern in D3 with special cases for enter, update, and exit selections. It shows a bowl of fruit where apples are added, removed, and replaced with lemons over time, using a scaleOrdinal for colors and radii. The code imports scaleOrdinal from d3 and uses selection.merge() to handle overlapping enter and update logic, while exit().remove() cleans up removed elements. The visualization renders with SVG, using data joins on groups, circles, and text elements to reflect state changes.