a stone rolling downhill a vehicle traveling on a bumpy road a string vibrating on a guitar a grasshopper jumping up and down occasionally
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of the following is the best example of a wave?
Possibilities:
- a stone rolling downhill
- a vehicle traveling on a bumpy road
- a string vibrating on a guitar
- a grasshopper jumping up and down occasionally

a string vibrating on a guitar