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At the Hub of a Three-Tier System Is A

question 56

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At the hub of a three-tier system is a:


Definitions:

Coral Reefs

Biodiverse underwater ecosystems constructed by colonies of coral polyps held together by calcium carbonate, found in tropical oceans.

Sea Caves

Natural hollows formed by the wave action of the sea on weak points in coastal cliffs, known for their stunning landscapes and ecological habitats.

Marine Terraces

Flat, wave-cut platforms formed by the erosion of marine shores, marked by a rise in sea level or land level.

Sea Level Risen

The increase in the global average level of the oceans, attributed mainly to climate change and the melting of ice caps and glaciers.

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