Answer:
snap.chat and tiktok
Step-by-step explanation:
i use snap.chat the most because i talk to a lot of people and it's just something that everyone uses so i end up using it the most. its also better than instag.ram dm.
tiktok is also an app i use a lot because since the whole shut down and quarantine process, ive become really bored like a lot of other people, so tiktok is fun to go on watch/make videos.
i think the social that is most used by other people my age (16) is snap.chat because its the easiest way to communicate with your friends. you can message, send snaps/pictures/videos, and add to your story. theres so much to do on snap.chat and almost everyone uses it. this makes it the most used app since everyone talks on it.