Dr. Delinah Hurwitz, a professor of psychology, suggests that spending time on the Internet is a kind of addiction. She found that people became hooked because endorphins, a chemical produced by the body, act like a drug that rushes through the person’s brain and body every time they receive a response to a post.
Or the last two.
This is because they talk about the main idea internet is bad for children and they also have the suppoerting details.
An idiom is when a phrase is used, but is not physically appropriate and not happening. Hitting the sack means to fall asleep, not actually hitting a sack :)
