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.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.