b -trench
c -convergent
d- divergent
The correct answer is - c - convergent.
The convergent boundaries are the plate boundaries where two or more tectonic plates move towards one another. Because of the high pressure that is made on the land because of the pushing against one another by the plates the land starts to lift up. The process is pretty slow, but gradually as the land lifts up more and more and gains on elevation the first signs of a hill will appear, than small mountain, and as the process continues it can end up with a very high mountain. The Himalayas are a perfect example of the results of this type of boundary.
The answer is C i hope this helps
Water and salt. There are many components to it tho
A secondary wave is a type of seismic wave that shakes particles at right angles to their direction of travel.
A seismic wave is a wave that travels through the Earth. It happens because of an earthquake, volcanic eruption, magma movement, a large landslide, and a large man-made explosion that produces low-frequency acoustic energy.
These waves are studied by seismologists and they record the waves using seismometers. In water, they use hydrophones or accelerometers. Seismic waves are different from seismic noise, which is persistent low-amplitude vibration arising from a variety of natural and anthropogenic sources.
The velocity of a seismic wave depends on the type of wave as well as the density and elasticity of the medium. Velocity tends to increase with depth through Earth's crust and mantle but drops sharply going from the mantle to Earth's outer core.
Earthquakes create distinct types of waves with different velocities.
Learn more about seismic here:
#SPJ2