Answer the following question given this paragraph: 

19.4 Community Ecology Communities include all the different species living in a given area. The variety of these species is referred to as biodiversity. Many organisms have developed defenses against predation and herbivory, including mechanical defenses, warning coloration, and mimicry. Two species cannot exist indefinitely in the same habitat competing directly for the same resources. Species may form symbiotic relationships such as commensalism, mutualism, or parasitism. Community.


Q: Commensalism, mutualism, and parasitism are known as what type of relationships?

 Choices:

- simple

- peculiar

- various

- symbiotic

A:
symbiotic
