- A Parasitism
- B Commensalism
- C Mutualism
- D Amensalism
Correct answer: C. Mutualism
Explanation: Mutualism is an interspecific interaction where both participating species derive benefit, such as lichens (fungus and algae).
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.