one plate is sliding past another. one plate is being forced beneath another. two plates are colliding into each other. two plates are pulling apart from each other.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: The Mariana Trench is the deepest ocean trench on Earth. This trench occurs at a plate boundary where
Possibilities:
- one plate is sliding past another.
- one plate is being forced beneath another.
- two plates are colliding into each other.
- two plates are pulling apart from each other.

one plate is being forced beneath another.