______ are formed by a symbiotic relationship between algae and fungi.
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Saprophytes
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Parasites
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Lichens
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Mosses
C
Correct answer
Explanation
Lichens are composite organisms resulting from a symbiotic relationship between a fungus and a photosynthetic partner, usually an alga. The fungus provides a protected environment and minerals, while the alga provides food through photosynthesis. This mutualism allows them to survive in harsh environments.