Can people only be complete once they embrace their ancestral culture explain why

Not exactly.

Explanation: No, I wouldn't say people are only complete when they're aware of their ancestral culture. Many people have no idea who their great great great grandma was, or even know she existed. I think a lot of people are focused on the now, and either don't have time, or just wouldn't like knowing. It is a very good thing to be proud of your culture, and where you've come from, but it is not a necessity. You don't need to embrace your culture, or race, to be confident and proud of who you are.

Side note: If this wasn't what you met, I'm sorry for any inconvenience!

the way you did it is okay (not really the best) but it could use a little work.

explanation:

dreams can say a lot about the personalities,thoughts, feelings, and intentions of people, what exactly do dreams mean? are the dreams we have   a result of our thinking process or are they connected to our hidden desires? facts and fiction will be used to uncover the truth behind our dreams.

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).