Answer + Explanation:
There are many concerns I have about using social media, but my biggest concern is accounts with fake identities and hackers. This would also be risky and dangerous for a child to come across, now that "catfishing" exists. There's way more websites, acts, type of people that can be dangerous or risky for children to come across, but I'll just name a few, cyberbullies, scammers, private info., accidentally downloading malware, phishing, etc.