- Tossing a ball in the air cannot form a source of vibration
- A wave is formed by the vibration of the source spreading around from the source
- So, tossing a ball in the air cannot form a wave

Therefore, tossing a ball in the air cannot form a wave
[Question]Students are learning about different types of waves. Which is the least likely way for the students to generate a wave?
[Context]- Tossing a ball in the air cannot form a source of vibration 
- A wave is formed by the vibration of the source spreading around from the source