Which scenario describes periodic behavior? . a. the path a dolphin swims in the ocean. b. the takeoff and landing of a jet plane. c. the flight of a football during a pass. d. the movement of the hands on a clock

The answer would be : D. The movement of the hands on a clock

Periodic behavior refer to a behavior that ALWAYS follow an exact same pattern over (same speed, same direction, same movement)
the movements from other choices are affected by too many factors to able considered as a periodic behavior

hope this helps

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