Which relationship does Lichen show?

The correct answer is Mutualism

Explanation:

• Lichens are symbiotic associations between fungi and algae or cyanobacteria. This partnership is a classic example of mutualism, where both organisms benefit from each other.
• The fungus provides the structure and protection for the algae or cyanobacteria, while the algae or cyanobacteria perform photosynthesis to produce food that benefits the fungus.
• Lichens can thrive in harsh environments where neither the fungus nor the algae could survive alone, such as on rocks, tree bark, and other exposed surfaces.

Other Options:

• Commensalism: This is an interaction where one organism benefits, and the other is neither helped nor harmed. An example would be barnacles on a whale. 
• Parasitism: In parasitism, one organism (the parasite) benefits at the expense of the other organism (the host). An example would be tapeworms in the intestines of animals. 
• Amensalism: This is a type of interaction where one organism is inhibited or destroyed while the other remains unaffected. An example would be the release of antibiotics by fungi that kill surrounding bacteria. 

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