2. Temperature drives water movement in some lakes. 3. Wetlands have slow water movement or no water movement and no turnover. 4. Estuaries are very productive and are used as breeding grounds by many species of fish. 5.Tropical coral reefs generally exist in relatively shallow areas of the ocean.

coral coral, any of a variety of invertebrate marine organisms of the class Anthozoa (phylum Cnidaria) that are characterized by skeletons—external or internal—of a stonelike, horny, or leathery consistency. The term coral is also applied to the skeletons of those animals, particularly to those of the. Cystiphyllum

Reliability, availability and serviceability ( RAS ), also known as reliability, availability, and maintainability ( RAM ), is a computer hardware engineering term involving reliability engineering, high availability, and serviceability design.