Fact 1: Matter vibrating can cause sound.

Fact 2: Thus, sound is a wave in air .

Given the two facts above, answer the question "what can matter vibrating cause?" with the following options: 
- Pollution
 - energy
 - Relieve pain
 - kinetic energy
 - wave in air
 - Energy.
 - murmur
 - Greenhouse gases


 

     wave in air    