Liquids that do not mix form into layers when they have different densities. These types of liquids are called immiscible. Depending on how many types of liquids are mixed, they can form two or more layers. A good example of this would be oil and water. Because their densities are different they do not mix well.
Answer:
This is an example of a symbiotic relationship.
Explanation:
A symbiotic relationship is a close, prolonged association between two or more organisms of different species that normally benefits both members. A good example of symbiotic relationship is a coral and algae, bacteria in the human gut etc
From the information provided, the algae perform photosynthesis, providing the coral with nutrients for feeding and help with calcification. In return, the coral provide the algae with nutrients for it's growth.
I think because there is no solution to this question