What causes the wide variety of color observed in a coral bed? a. presence of bacteria b. presence of photosynthesizing algae c. coral bleeding d. ocean acidification

The presence of photosynthesizing algae.

The correct answer is -

Presence of photosynthesizing algae.

Explanation:

Corals are dependent upon algae (such as zooxanthellae) that provides large amount of nutrients ( such as organic carbon) and oxygen (through photosynthesis) that is required for its growth. Also, it plays significant role in the lives of marine ecosystem (such as small and large fishes).

Thus, a wide variety of color is observed in the coral bed because of presence of photosynthesizing algae.

rain is the best answer

carbon traps heat so more of it makes it hotter causing global warming. during the ice age carbon levels in the atmosphere were low so it got very cold. so the common things between them is carbon levels in the atmosphere.