Answer:
They travel through solids.
Explanation:
P waves are faster than S waves and are capable of travelling through any medium. S waves are also known as secondary waves. They move more slowly than P waves and also move perpendicularly to the direction of movement. S waves can travel through solids like P waves, but they cannot move through liquids. The fact that S waves are not present in the outer core of the Earth is a hint that this layer is probably liquid.
