It's used to guide and organize the entire outline. (should be the main focus of the paper.)
Most likely a. (The Nurse cares for Juliet as if she were her mother) Romeo and Juliet showcases obvious romantic love, Mercutio and Tybalt are enemies while the Nurse simply works as a servant for Lord/Lady Capulet.
C. Motivation
it's what motivated them to do something
Macbeth has several themes such as free will, ambition, power and versions of reality. hope that helped :-)
