Step-by-step explanation:
Obviously this is all opinion based so these are just examples of what you could say.
1. Phones
2. because it can turn into an addiction and people become glued to their phones and forget about their outside environment e.g. care less about school and more about social media.
3. reference social media damaging people's body perceptions and mental health's
4. Young people could disagree because some are addicted so wouldn't want to admit to the problem.
5. Write your own opinion