What is an Example of a cyclic behavior?

An example of cyclic behavior is the changing of the seasons throughout the year. This cycle repeats annually, with winter giving way to spring, followed by summer and autumn, before returning to winter. Another example is the lunar phases, where the moon transitions through its new, waxing, full, and waning phases in a roughly 29.5-day cycle. Both examples illustrate predictable patterns that recur over time.