The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Choose the missing words of the phrase or sentence.

On the Internet, inhibitions go out the window. It's a good vehicle for bullying other people because you're not face to face with the other person, and it becomes a dehumanizi experience. Yet, too many hours on-line can also cause you to lose your social skills and graces for the "real world" because you have fewer "training opportunities, for interacting with other people.
One （） of online chatting.