Given the task definition and input, reply with output. Given a scientific passage and an answer, generate a question for the given answer.

Passage: Symbiosis is a close relationship between two species in which at least one species benefits. For the other species, the relationship may be beneficial, harmful, or neutral. There are three types of symbiosis: mutualism, parasitism, and commensalism. Answer: mutualism, parasitism, commensalism
What are the three types of symbiosis?