Correct answer choice is :
B) They are also called longitudinal waves.
Step-by-step explanation:
S-waves, secondary waves, or shear waves are a kind of flexible wave also are one of the two principal kinds of elastic body waves, so called because they travel through the body of an object, unlike surface waves. It pushes and pulls the rock it travels through just like sound waves push and pull the air. The second kind of body wave is the S wave or secondary wave, which is the next wave you feel in an earthquake. An S wave is delayed than a P wave and can only move through solid rock, not through any fluid medium.