1) Mutualism 2) Symbiosis 
Trophobiosis is a symbiotic association between organisms where food is obtained or provided. The provider of food in the association is referred to as a trophobiont. The name is derived from the Greek trophē meaning `nourishment` and -biosis which is short for the English symbiosis. Among the more noted trophobiotic groups are ants and members.....
exchange of nutriment in symbiotic relationship
[n] - a symbiotic relation is which one organism protects the other in return for some kind of food product
trophobiosis, trophobiotic Symbiosis in insects in which food is obtained from one species (the trophobiont) by another in return for protection.
noun a symbiotic relation in which one organism protects the other in return for some kind of food product