The online world has both advantages disadvantages for teenagers who want to communicate with friends. Not suitable for people who did not survive, as it may not be safe.
The online world has both advantages and disadvantages. For teenagers who want to communicate with friends. For those who are not saved, because it could not secure it.
The online world with both advantages and disadvantages. Suitable for teenagers who want to communicate with friends. Not suitable for people who take a survive not because there may be no security.