Why do you think P-waves and S-waves are also called body waves? Explain..

Body waves are two types: compressional or primary (P) waves and shear or secondary (S) waves. P- and S- waves are called “body waves” because they can travel through the interior of a body such as Earth’s inner layers, from the focus of an earthquake to distant points on the surface.

Idon’t know i’m just trying to get points to make me look smawt