The correct answer is Independent. The sentence can stand on its own, its not a fragment.
hope this helps!
Answer:(I think)
Subjects and verbs must agree in person and number
Pocahontas and John Rolfe
This would be considered a field of study. This is a form of Philosophy.
A child can be a reliable source because children are so young and pure, their views usually are not biased and they just tell the story like they see it.