move through different materials. are pulled by the force of gravity. lose energy to surrounding rocks. reflect off of boundaries.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: When an earthquake occurs, the speed of the seismic waves changes as they
Possibilities:
- move through different materials.
- are pulled by the force of gravity.
- lose energy to surrounding rocks.
- reflect off of boundaries.

move through different materials.