Which option best captures the notion of cycle?

• A. an long period with no repetition
• B. the action of circulating something
• C. a period of time without repetition
• D. a series of events that repeats over time

Answer: (D)

Cycle means a sequence of events that repeats over time, returning to the starting point. This repeating loop is exactly what the option describes, capturing the idea of a pattern that recurs rather than a one-time occurrence or mere movement. For example, the water cycle goes through evaporation, condensation, and precipitation again and again, forming a continuous loop. The other descriptions don’t convey this repeating sequence: circulating something refers to movement around a center, and a period with no repetition describes something that doesn’t loop back or recur.