What is the main idea of the whole article?
Facebook, MySpace, and Bebo are popular social newworking sites.
Social networking sites have changed human communication.
Social networking sites make people feel more "connected" to others
What is main idea of Himanshu Tyagi's warning in paragraph 2?
People born after 1990 use the Internet to communicate with others.
The Internet moves fast and it changes all the time.
Internet social networking can hurt younger generations..