Question

question 11
which is a reason most corals live in shallow waters? choose the best answer.
there is more sunlight in shallow waters for the corals photosynthetic algae.
there is less turbulence in shallow waters to prevent breaking of delicate corals.
there are fewer predators in shallow waters.
none of these choices.

Explanation:

Coral reefs have a symbiotic relationship with photosynthetic algae (zooxanthellae). These algae need sunlight for photosynthesis, which is more abundant in shallow waters. Turbulence is not necessarily less in shallow waters (e.g., wave - action in shallow coastal areas can be significant). Also, shallow waters do not have fewer predators (many coral predators like certain fish species are common in shallow reef environments).

Answer:

There is more sunlight in shallow waters for the coral’s photosynthetic algae.