In which ocean is ‘Mariana Trench’ located?

The correct answer is Pacific Ocean. 

Key Points

• The Pacific Ocean got its name from the explorer Ferdinand Magellan. He called the ocean "mar pacific", which meant a peaceful sea. The Pacific Ocean is the largest and deepest ocean on Earth. The Pacific ocean covers more than 30% of the earth's surface.

Important facts about Mariana Trench:

• The Mariana Trench or Marianas Trench is located in the western Pacific Ocean
• It is located about 200 kilometres (124 mi) east of the Mariana Islands.
• 'Mariana Trench' is the deepest location on Earth.
• It is crescent-shaped and measures about 2,550 km (1,580 mi) in length and 69 km (43 mi) in width.
• The maximum known depth is 10,984 metres (36,037 ft), known as the Challenger Deep
• Some unrepeated measurements place the deepest portion at 11,034 metres (36,201 ft).
• The Mariana Trench is part of the Izu–Bonin–Mariana subduction system that forms the boundary between two tectonic plates.
• In this system, the western edge of one plate, the Pacific Plate, is subducted (i.e., thrust) beneath the smaller Mariana Plate that lies to the west.
• The United States has authority on Trench and its resources.

Hence, on the basis of the above facts, we can infer that the Mariana Trench is located in the Pacific Ocean.