What is the main feature of stalking?

The main feature of stalking is characterized by repeated conduct that causes fear or emotional distress. This behavior usually involves an individual persistently following, harassing, or monitoring another person, thereby instilling feelings of terror or distress in the victim. Stalking is often recognized as a serious crime due to its impact on the victim's mental and emotional well-being, and it can escalate to more severe forms of harassment or violence.

In contrast, the other choices relate to different legal violations or behaviors. Operating a vehicle while impaired pertains specifically to driving under the influence of drugs or alcohol, which is unrelated to the notion of stalking. Intentional conduct that annoys may describe a range of annoying behaviors but lacks the repetitive and fear-inducing characteristics that define stalking. Unequal distribution of controlled substances deals with drug-related offenses, which do not fall under the category of stalking at all. Thus, repeated conduct causing fear or emotional distress is the defining trait of stalking, making this answer accurate.