Question: Two organisms living together for their mutual benefit?
Answer: Symbiosis
Disambiguated annotations:
qaPairs: question: What is it called when two organisms living close together, long term for their mutual benefit?
answer: Symbiosis
question: What is it called when two organisms living together, not necessarily long term, experience net benefit?
answer: Mutualism
question: What is the evolutionary process called when two organisms living together work or act together for mutual benefits?
answer: Co-operation