The plural form would be in this case of the verbs involved in the statement, which are in singular form. So in this case, by changing the singular verbs to plural it would be:
My youngest daughters just turned 29. They haven't had children of their own yet, but they love their nieces.
First person view is the view point of the character writing or speaking directly about themselves. Third person view is the author or narrator telling the story. One advantage for First person would be that you can hear or read the thoughts the characters or having. A disadvantage in third person view is you can't know what the characters are thinking only their actions and what they say.
Fosho whats up bro how u doing
Answer:
Some benefits are that you can then learn what seems to be true. If multiple sources say the same things in some way, it's probably true. Also, some sources may contain more and/or clearer information than others. Some may include quotes others cannot provide, have pictures, and maybe even videos. The more sources you have, the more (accurate) information you can get.