#symbiosis__symbiosi__mutualism  the relation between two different species of organisms that are interdependent; each gains benefits from the other
  supertype:  #interdependence__mutuality__interdependency  a reciprocal relation between interdependent entities (objects or individuals or groups)
  subtype:  #trophobiosis  a symbiotic relation is which one organism protects the other in return for some kind of food product

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