Final answer:
The subject of this question is Health. Sexual activity with a corpse is known as necrophilia, which is considered illegal and morally condemned in most societies.
Step-by-step explanation:
The subject of this question is Health as it deals with various aspects of sexual activity and behavior.
The term used to describe sexual activity with a corpse is necrophilia.
Necrophilia is considered a paraphilia, which is a sexual interest or arousal related to atypical objects, situations, or individuals. It is important to note that necrophilia is illegal and morally condemned in most societies.