Question 4 (1 point) Seismic waves, or waves that travel through the Earth’s layers, can be caused by earthquakes and volcanoes. Provided below is a model showing how seismic waves travel through rocks of different density. Based on the provided model, do seismic waves travel faster in more dense rocks or less dense rocks? a. More dense rocks, because the refracted angle is closer to 90° with the boundary. b. Less dense rocks, because the refracted angle is closer to 90° with the boundary. Selected:c. More dense rocks, because the refracted angle is further than 90° with the boundary d. Less dense rocks, because the refracted angle is further than 90° with the boundary