First of all, I think you mean "a part". To be "a part of a community" means that you are a member of a social group or circle. To be "a part of a family" means you are a member of a family. However, when you do not include the space between "a" and "part" and simply use the word "apart" the meaning is changed and the sentence is grammatically incorrect. The word "apart" implies that you ARE NOT a part of whatever you are talking about. However, if you want to say that you are "APART" and that is the word you mean, you would say "APART FROM a community" or "APART FROM a family" meaning you are different than the community/family.
I hope this makes sense!
Good luck!
Answer:
Generations, like people, have personalities, and Millennials — the American teens and twenty-somethings who are making the passage into adulthood at the start of a new millennium — have begun to forge theirs: confident, self-expressive, liberal, upbeat and open to change.
Explanation: