Which tribe is associated with the practice of mortuary cannibalism and is located in New Guinea?

The Fore tribe, located in Papua New Guinea, is notably associated with the practice of mortuary cannibalism. This practice involved consuming deceased relatives as an act of mourning and reverence, a ritual meant to ensure that the spirit of the deceased remains within the community. The Fore's cannibalistic practices were linked to the spread of a prion disease known as kuru, which affected those who participated in the rituals. This phenomenon has been well-documented and studied in anthropology, illustrating a unique intersection of cultural practices and health implications.

The Yanomami, while they have other unique cultural practices, are not specifically known for mortuary cannibalism. The South Fore, while closely related to the Fore and sharing some cultural similarities, refers more broadly to a different classification of the same group rather than a distinct practice. The Malagasy, from Madagascar, have their own rich cultural traditions but also do not practice mortuary cannibalism. Thus, the Fore stands out as the correct answer due to this significant and well-documented cultural practice.