Reef-building corals were
confined to relatively shallow depths because
many of these corals have microscopic algae
called zooxanthellae living inside their soft tissues.
These algae
are often important for the corals’ nutrition and
growth, but require sunlight for photosynthesis. There is no sunlight deep in the water.
Answer:
I think its B: Refrigerator, but double check
Explanation:
There relationship is getting older and older over time and the follis break apart.
They bond together creating compounds
