Answer:
a word that shows sources that offer more information about the point on which the texts differ
Explanation:
They can show diffrent peoples idea's on the point
1) Did she have the courage to leave a cushion job
2) Finally she worked up the courage and turned on the computer.
3) His words put courage into every heart
4) The child was small and somewhat deformed, but of great courage and intelligence.
5)Finally she dragged up the courage to broach the subject.
Gravitational firce and speed,light i guess. LOL im not even sure is this is right