Question

Which relationship is beneficial to both interacting organisms but is not obligatory?

• A. Commensalism
• B. Protocooperation
• C. Mutualism
• D. Both B and C

Answer 1

The correct option is B Protocooperation

A. Commensalism is the relationship between two different organisms in which one is always benefitted and the other is neither benefitted nor harmed.

B. Protocooperation is the relationship between two species which is beneficial and favourable to both but not obligatory to both.

C. Mutualism is the relationship between two or more individuals in which all are benefitted by each other.

So, the correct answer is 'Protocooperation'.