Final answer:
The period of a wave is the time it takes for one complete wave cycle to pass a fixed position.
Step-by-step explanation:
The correct answer is c) Period. The period of a wave is the time it takes for one complete wave cycle to pass a fixed position. It is measured in seconds (s). For example, if the period of a wave is 0.5 seconds, then it takes 0.5 seconds for one full wave to pass a fixed position.