Answer the following question given this paragraph: 

A surface wave is a wave that travels along the surface of a medium. The medium is the matter through which the wave travels. Ocean waves are the best-known examples of surface waves. They travel on the surface of the water between the ocean and the air.


Q: What is the general name for a wave that travels along the surface of a medium?

 Choices:

- stack wave

- speed wave

- light wave

- surface wave

A:
surface wave
