What type of sexual activity is specifically mentioned as rape?

The concept of rape, as defined in legal contexts, typically specifies penetration as a key element. This includes penal (or penile) penetration of the vaginal canal, which is why the second choice is identified correctly. The law often underscores the necessity for some form of force or lack of consent to classify the act as rape, particularly focusing on this specific act of penetration.

Other options describe broader categories of sexual activity, which may encompass various forms but do not specifically meet the legal criteria for rape. For instance, "any sexual activity" could include acts that may not be classified as rape, while "only oral sex" and "sexual contact of any kind" could refer to activities that might not involve penetration. Thus, the emphasis is on the definition aligned with legal standards, where penile and vaginal intercourse represents the specific act designated as rape under the law.