Question

Which feature is characteristic of healthy coral reefs?

A. Shallow, clear water
B. Clear freshwater
C. Deep, salty water
D. Cold, murky water​

Answer 1

Healthy coral reefs are characterized by shallow, clear water and high biodiversity. The organisms living in the reefs have a mutualistic relationship with photosynthetic unicellular algae, which provide them with nutrition and energy. This clear water allows light to penetrate, supporting the growth of both corals and algae.

Step-by-step explanation:

Coral reefs are ocean ridges formed by marine invertebrates living in warm shallow waters within the photic zone of the ocean. They are mostly found within 30 degrees north and south of the equator. Coral reefs are characterized by high biodiversity and the structures created by the invertebrates that live in them. They provide nourishment and shelter for a wide variety of species, including over 4,000 fish species.

Shallow, clear water is characteristic of healthy coral reefs. The organisms living in these reefs have a mutualistic relationship with photosynthetic unicellular algae, which provide them with nutrition and energy. The clear water allows light to penetrate, allowing the algae to carry out photosynthesis and the corals to thrive.

Answer 2

Answer A

Step-by-step explanation:

The correct answer is option A, that is, shallow and clear water. Coral reefs refer to the shallow-ocean habitats, which are occupied with sea life. The massive composition that coral reef comprises of is actually manufactured of coral polyps that are the small marine species, which live in colonies.

The hard compositions are left behind when these marine species die, and the branching and stony composition, which is left is limestone and is robust enough to produce a home for new species.