Question

What do sound waves, light waves, and ocean waves all have in common?

Answer 1

I don't want to scare you, but I suggest that we look at the choices
and THINK about them:

A.  No.  Light waves don't need a medium.

B.  No.  Sound waves and ocean waves are not electromagnetic waves.

C.  Yes!  All waves move energy from one place to another.

D.  No.  Light waves are not mechyanical waves. 

Answer 2

C. They all transfer energy