B, because the colon is used to show an example or list of that subject being spoken about
Before a words is called a prefix, after is a suffix
Answer:
The Andes were formed by tectonic activity whereby earth is uplifted as one plate (oceanic crust) subducts under another plate (continental crust). ... When this large portion of dense material was removed, the remaining portion of the crust underwent rapid uplift.
Facts to back the information up.
