P waves and S waves alike because they travel through solids.
Option C
Explanation:
They both travel through solids and hence they are alike in that way. The waves produced during an earthquake and are called seismic wave. They also transmit energy released on the earth. It is also to be noted that "P waves travels faster than S waves", they also travel through solids, liquids and gases, and they are also push and pull waves. S waves happen after the P waves, and don't travel as fast as P waves. Also, S waves travel through only solids and not gases or liquids, hence the point of similarity between P and S waves is that they both can travel through solids.
