By definition none do. Parasites harm the host that they prey upon.
One species benefits and other is harmed
It's called a parasitic relationship when one species benefits and one species is harmed. A simbiotic relationship is when both species benefit.
It has no parasitic relationship whatsoever.
A symbiotic relationship is when both species need each-other to survive, for example the lynx and the hare. Without the hare the lynx would starve and without the lynx the hare would overpopulate. A parasitic relationship is where one species benefits and one is damaged.
A one-way relationship where one species benefits at the expense of another is known as parasitism. In this relationship, the species that benefits is called the parasite, while the species that is harmed is known as the host.
A parasitic relationship does not benefit organisms.
That would be the evolution of an exclusive symbiotic or parasitic relationship.
predator
It would be the parasite
On the face of it, the relationship does seem to be parasitic, but you must remember that:Parasitism is a type of symbiotic relationship between organisms of different species where one organism, the parasite, benefits at the expense of the host.(from Wikipedia)The mother benefits in the long term, because it is propagating the species.
It would be the parasite
a parasitic relationship