Explain why we need a hyphen in this sentence:

Sam is a second-year med
student.

But not in this sentence:

Sam is in his second year at med school

there is 2 main differences, basically which are the users and the market. the other difference is the kind of content

people who use tik tok are mainly people from east asia, kind of like the app douyin. musically, on the other hand, are used by people from america or european countries.

while tik tok videos show things like daily life videos, comedy, or just funny videos, musically are like people mimicking songs with their own actions, 'imitate' singers and video clips.

hope this !

entrepreneur give a lot of money to people so the answer is a

the answer is c bro ok