Question

Corals live near the ocean surface in some warm regions of the world. The corals provide a home for algae. The algae, in turn, produce food chat is used by the corals. Which of these is a biotic factor in this ecosystem?
A.. the temperature of the water

B. the salt content of the water

C. the size of the algae population .

D. the amount of sunlight that reaches the coral​

Answer 1

Answer:

The correct answer is C. the size of the algae population .

Explanation:

An ecosystem is made up of biotic and abiotic factors. Biotic factors are the living components of an ecosystem that impact the ecosystem and abiotic factors are the non- living components that have their own impact on the ecosystem.

So according to the definition of biotic factor algae is the biotic factor in this question because algae is a living component of the ecosystem that influences the ecosystem by providing food to the corals.  

So by providing food algae supports the coral's ecosystem and coral provides a home to algae to grow. In the ecosystem, both biotic and abiotic factors interact with each other.

So the correct answer is C. the size of the algae population.