Mobile phones play a major role in communication.
.... it's important to have this "a" in this line.
Parents are giving mobile phones to their children to communicate effectively.Parents are allowing children to have mobile phones mainly because they want to communicate with their own children.
. I believe that children using mobile
gadgetsphones can be are very harmful for their cancer in many respects.
... I think there are more important negative issues that mobile phones can cause such as addiction to electronic devices, helping crimes, distancing people etc.
misusage cell phonemisuse of cell phones
Continuous usage of cell phone results in stress and anxiety for the children.
.... good sentence.