Answers

2015-09-17T16:37:46+05:30
He / She should try his best to to reduce that habit.Because in this modern generation,its really important to mingle with family,friends and nature.He/She could utilise the environment and play some healthy games too. He / She could gradually shorten the timing and stop this .And if he/she is a school going student it is surely going to reflect on studies.It is going to affect him/her mentally and physically.So make your classmate understand the negative effects of this and suggest him/her to enjoy nature. 
Hope it helps and pls mark it as the best answer. :-)
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