A
Students today live a life of modern convenience, where socializing and recreation are often replaced by the use of electronics for entertainment. They prefer to spend their days indoors at a computer or video game console than outside playing sports of exercising. The availability of electronic distraction is a contributing factor to an emerging trend in computer game addiction among students.
Source:
http://www.ehow.com/info_8713643_computer-games-addiction-among-students.html#ixzz2mKWiJHjV

B
Computer addiction can have a variety of negative effects on a person. The most immediate are social. The user withdraws from friends and family as he spends more and more time on thecomputer. Relationships begin to wither as the user stops attending social gatherings, skips meetings with friends and avoids family members to get more computer time. Even when they do interact with their friends, users may become irritable when away from the computer, causing further social harm.
Eventually, excessive computer use can take an emotional toll. The user gradually withdraws into an artificial world. Constant computer gaming can cause someone to place more emotional value on events within the game than things happening in their real lives. Excessive viewing of Internet pornography can warp a person's ideas about sexuality. Someone whose primary friends are screen names in a chat room may have difficulty with face-to-face interpersonal communication.
Over the long term, computer addiction can cause physical damage. Using a mouse and keyboard for many hours every day can lead to repetitive stress injuries. Back problems are common among people who spent a lot of time sitting at computer desks. Late-night computer sessions cut into much-needed sleep time. Long-term sleep deprivation causes drowsiness, difficulty concentrating, and depression of the immune system. Someone who