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In which of the following interactions both partners are adversely affected?

1. Predation
2. Parasitism
3. Mutualism
4. Competition

Correct answer: Competition

Solution

Competition is the interaction in which both organisms are harmed because each uses the same limited resource, lowering the fitness or growth of both. In predation and parasitism, one benefits while the other is harmed; in mutualism, both benefit.

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