Answer: She is reading a Theory
Explanation:
A theory is defined as the set of principles and knowledge that govern a science, doctrine, or activity. In Andrea's case, she is reading an introductory topic on human aggression. Issues like these are supported by a series of theories that try to explain their cause.
No one is rich.
No one is poor.
Everyone has the same things.
No one is more important than anyone else.
Everyone works for the good of society.
