Final answer:
Barnacles on a whale is an example of commensalism, a symbiotic relationship where one organism benefits while the other is unaffected.
Step-by-step explanation:
Answer:
The barnacles on a whale is an example of commensalism. This is because barnacles benefit from attaching themselves to the whale's body, gaining protection and a steady source of food. However, the whale is unaffected by the presence of the barnacles and neither benefits nor is harmed by this relationship.
In contrast, mutualism occurs when both organisms benefit from the relationship, predation involves one organism preying upon another for food, and parasitism occurs when one organism benefits at the expense of the other.
Learn more about Symbiotic relationships