- A Mutualism
- B a brood parasitism
- C only competition
- D the amensalism
Correct answer: A. Mutualism
Explanation: Mycorrhizae are a mutualistic fungus-root association.
Concept context
How organisms interact with abiotic factors and respond to stress, plus population attributes, growth models, and interspecific interactions such as predation, competition, and mutualism.