Soil liquefaction occurs when
a. seismic vibrations have no impact on topsoil.
b. seismic vibrations pollute the entire atmosphere.
c. seismic vibrations cause the ground to act like a liquid.
d. seismic vibrations impact only the inner core of earth.

The correct answer should be C. Seismic vibrations cause the ground to act like a liquid. This is easily testable and you can even do it in your own house. If you shake a jar full of sand and simulate seismic vibrations like an earthquake, you will see that the ground in a jar or sand or anything similar will behave more like liquid than like solids.

Avertical or horizontal line used in graphs is called a(n) equatorhope this

He want to contact the red cross/red crescent because they are the main non profit organization that deals with disasters around the world