The condition of being a creature of the faction type 2 benefit from living together. If a party is not able to sustain life, such as lichen, which is a collaboration of algae and fungi, addresses, etc.
The relationship of coexistence of two kinds of creatures each partner to benefit from living together. If the party was unable to live as lichens, which are common algae, mold and so on.
State one's relationship coexistence of life 2 type each benefit from living together. If the lack of any party will not be able to live, such as lichens.And so on.