Which statement best defines incest?

The best definition of incest is sexual intercourse between persons related in a manner prohibited by law. This definition encompasses the legal and cultural contexts in which incest is recognized, delineating the specific familial relationships that are legally restricted. Laws vary by jurisdiction, but they typically cover close blood relatives, such as siblings, parents, and sometimes more distant relations, depending on local statutes.

Other options, while they mention aspects related to sexual activity, do not accurately capture the legal and familial prohibitions that characterize incest. Although the other statements may touch on certain elements of sexual relationships, they either lack specificity regarding prohibited relationships or do not address the legal implications that define incest.