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These regions, formed by diverging plate boundaries, are below sea level and hold
the majority of earth's water and contain features such as ocean ridges and deep
sea trenches.
Mariana Trench
Land Rifts
Ocean Basin
Sea Caves

Answer :

Answer:

Ocean Basin

Explanation:

Ocean basin, any of several vast submarine regions that collectively cover nearly three-quarters of Earth's surface. Together they contain the overwhelming majority of all water on the planet and have an average depth of almost 4 km (about 2.5 miles).

from Britannica.com