The following argument is based on a study conducted regarding social media usage and its impact on adolescent mental health:

'A recent study by the University of Health Sciences revealed that adolescents who spend more than five hours a day on social media report higher levels of anxiety and depression compared to those who spend less than two hours. Therefore, we should limit adolescents’ social media use to two hours per day to promote better mental health.'

Write an essay analyzing the argument above. Consider the logical structure of the argument, its assumptions, and any potential weaknesses. Use grammar and syntax correctly to convey your ideas clearly and effectively.