Final answer:
Mourning is the aspect of death most influenced by culture, involving culturally specific rituals and practices in response to death, which vary significantly across different cultures.
Step-by-step explanation:
The aspect of death most highly influenced by culture is c. Mourning. Mourning involves the specific rituals and practices that are carried out in response to the death of a person. These rituals and practices are directly derived from cultural, societal, and religious backgrounds and can greatly differ from one culture to another. Examples include burial ceremonies, cremation, and the various rituals surrounding these practices. Küblers-Ross's book, On Death and Dying, outlines the five stages of grief, but it's important to note that not everyone experiences these stages due to differences in individual and cultural beliefs about death.