What is a "troll" in the context of web users?

In the context of web users, a "troll" refers to an individual who deliberately posts provocative, negative, or off-topic comments in online discussions with the primary intention of annoying or upsetting other users. This behavior is often intended to elicit emotional responses or to disrupt the conversation in a hostile environment. Trolls thrive on the reactions they provoke, and their contributions are typically not constructive but rather served to create conflict or confusion among participants. This definition aligns closely with the answer, highlighting the disruptive nature of a troll's behavior in digital communities.

The other choices describe users who positively engage with content or contribute constructively, which fundamentally differs from the characteristics of a troll. A troll stands out for their negative impact, contrasting sharply with users who enhance discussions.