Arestrictive adjective clause is . not set off with commas, set off with commas, set off with semi-colons, set off with brackets.

A restrictive adjective clause is not set off with commas

Explanation:

Adjective clauses are dependent clauses whose function is to modify or describe nouns. They can be either restrictive or nonrestrictive. When they're nonrestrictive, they contain information that is not essential to the sentence, meaning that without it, the sentence would still make complete sense. When these types of clauses are placed in the middle of a sentence, they're set off with commas, and when they're placed at the end of the sentence, they're followed by a comma.

A restrictive clause, on the other hand, is one that is never set off by commas because its content is essential to the meaning of the sentence: without it, the sentence would seem incomplete, unspecific, vague or would have a different meaning. An example of a sentence containing a restrictive adjective clause: The doctor who attended me last week is sick.

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 !

second one- because has facts and not opinion