Which crime involves knowingly abducting another person?

The crime that involves knowingly abducting another person is kidnapping. Kidnapping is specifically defined as the unlawful and intentional act of taking and carrying away a person by force or fraud. In this context, "knowingly" indicates that the perpetrator is aware that their actions are unlawful and are taking the individual against their will.

This crime is centered around the element of abduction, which means that the victim is removed from their environment without consent. Kidnapping typically entails a more severe legal implication, especially when factors such as confinement or the intent to hold for ransom are involved.

The other options, while related to the theme of restraint or unlawful control over a person, describe different situations. For example, aggravated kidnapping involves additional elements, such as the use of a weapon or the intent to commit another crime, and smuggling of persons refers to the illegal transport of individuals across borders typically for financial gain. Unlawful restraint is about restricting a person's movements without the same level of intent or severity associated with kidnapping. Thus, the core definition and implications of kidnapping clarify why it is identified as the correct answer in this context.