One species benefits and other is harmed
When one organism benefits and the other is harmed.
This relationship is known as parasitism, where one organism benefits (the parasite) at the expense of the other organism (the host), which is harmed.
a parasitic relationship
commensalism
parasitism
Parasitism
parasitism
A natural relationship in which one organism lives in or on another organism and benefits from the relationship while the other organism may be harmed is a parasitic relationship.
parasitism
parasitism
commensalism