Respuesta :
Answer:
a) autotrophic organisms and fungi in a mutualistic relationship
Explanation:
A lichen "is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species".
It is cyanobacteria + fungi, so it has to be two separate groups, and both cannot be fungi.
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answer is option C , lichens do colonize on rocks most of the time , this is because they really are saprophytic fungi , that secrete acids to melt and make the rocks suitable for growing on.