Answer: they allow air to enter lungs and also permits air into the body
Explanation:
There are two broad classes of seismic waves: body waves and surface waves. Body waves travel within the body of Earth. They include P, or primary, waves and S, or secondary, waves. P waves cause the ground to compress and expand, that is, to move back and forth, in the direction of travel.
Although at first it may seem like an antigen, it's a pathogen.
This is a trick question there is no there name for it
