Respuesta :
Commensalism is a relationship between two organisms in which one organism receives benefits from another organism and the other organism is not affected (does not benefit and is not harmed). From the question given above, brittle star and snapping shrimp benefits from sea sponges while the sea sponges are not affected in any way by the presence of these animals. This type of relationship represents commensalism.
Commensalism: because it is a relationship which is beneficial to one organism, and offers neither harm nor any benefit to the other. In this example, the brittle star and snapping shrimp benefit in several ways. The sponge receives neither harm nor benefit from the relationship.