Possessive Adjective:
* Their (most common)
* His or her (formal, avoids gender assumptions)
* Hers (if the group is all female)
* His (if the group is all male)
* Theirs (used when referring to something belonging to them)
Pronoun (referring to a group):
* They
* Them
* Those
Example:
* Their dog is very friendly.
* His or her homework is due tomorrow.
* Theirs is the red car in the driveway.
Important Note:
* "Their" is often used in situations where the gender of the individuals is unknown or irrelevant.
* "His or her" is a more formal and inclusive alternative.
Choose the synonym that best fits the context and tone of your writing!