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**Essay (120-150 words)** In my opinion, parents should strictly limit the time their teenage children spend on smartphones. The excessive use of smartphones can have a negative impact on teenagers' physical and mental health. When teenagers spend too much time on their phones, they often neglect their studies, social relationships, and physical activities. Furthermore, the blue light emitted from smartphones can interfere with their sleep patterns, leading to fatigue and decreased concentration. Strictly limiting smartphone use can help teenagers develop healthier habits, such as reading, exercising, or engaging in extracurricular activities. Additionally, it can also reduce the risk of cyberbullying, online harassment, and addiction to social media. By setting limits, parents can help their children maintain a balance between technology use and other aspects of life, ultimately promoting their overall well-being. **Article (100-140 words)** **Time to Unplug: Why Parents Should Limit Teenagers' Smartphone Use** In today's digital age, it's no surprise that teenagers are glued to their smartphones. However, excessive phone use can have serious consequences on their health, relationships, and academic performance. That's why parents should strictly limit the time their teenage children spend on smartphones. By setting limits, parents can help their children develop healthier habits, reduce the risk of cyberbullying and online harassment, and promote physical and mental well-being. It's not about depriving teenagers of technology, but about teaching them to use it responsibly. By setting a good example and establishing phone-free zones and times, parents can help their children achieve a better balance between technology use and other aspects of life. It's time for parents to take control and encourage their teenagers to unplug and live a healthier lifestyle.