PATHOLOGY

Detailed explanation-1: -Hence the correct answer is option B, an efficient parasite usually kills its host. Note:In parasitism, the parasite will never kill its host because it has to draw its nutrients and minerals from the host and if the host dies the parasite cannot survive on its own.

Detailed explanation-2: -Facultative parasites can complete their life cycle without a host, but may exploit hosts (i.e. become parasitic) under certain conditions.

Detailed explanation-3: -The parasite (in this regard, called kleptoparasite) may be from the same species as the victim. In this case, it is described as intraspecific. Or, it may be from a different species, and as such is described as interspecific.