It would be considered E
Since
Parasitism is when one be benifits at the others harm, normally has a host and parasite. Like a tic and dog. The tic is the parasite and the dog is the host
Competition is when two animals fight for prey, territory, or mates. Like when two male lions fight to prove strength and the winner leads the pack while the other is kicked out and must go find there own pack
Mutualism is is when two animals are counted as mutuals. Like the alpha male and female that believe they are equals
Predation is when one animal eats another it normally has a prey and a predator Like the cat and the mouse. The mouse is the prey and the cat is the predator
Commensalism two animals live peacefully in the same habitat. Like the cow and the cowbird both love in harmony