Question

what is called marine treach?​

Answer 1

Answer:

Mariana Trench, also called Marianas Trench, deep-sea trench in the floor of the western North Pacific Ocean, the deepest such trench known on Earth, located mostly east as well as south of the Mariana Islands. ... In 1899 Nero Deep (31,693 feet [9,660 metres]) was discovered southeast of Guam.

Explanation:

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Answer 2

Explanation:

deep sea trench in the floor of the western North Pacific Ocean