Answer the following question given this paragraph: 

Symbiosis describes a close and long-term relationship between different species. At least one species will benefit in a symbiotic relationship. These relationships are often necessary for the survival of one or both organisms. There are three types of symbiotic relationships: mutualism, communalism, and parasitism.


Q: What are the three types of symbiotic relationships?


A:
mutualism, communalism, parasitism