Which one of the following words means ''belonging to them'' 1. they'er 2. their 3. there 4 .all of the above?

The Word that means "belonging to them" is their. The other options, "they'er" and "there," are not correct in this context. "They'er" is not a standard English Word, and "there" refers to a place. Therefore, the correct answer is 2. their.