Question

The body of a lichen actually consists of two organisms. An alga and a fungus. The green alga provides food for the fungus through photosynthesis, while the fungus protects the alga and keeps it moist. This type of relationship is known as:
•Symbiosis
•Parasitism
•Decomposition
•Predator-prey​

Answer 1

Answer:

symbiosis

Explanation:

it's symbiosis because the fungus and alga are on the body of the lichen, and is providing benefits for one another. This could easily be misinterpreted as parasitism, but that would be when an organism is inside the host and is providing harm rather than goods.