Answer: Identity and role confusion.
Explanation:
 
        
             
        
        
        
Regina wants to use her degree in psychology to help businesses hire great people and keep them happy enough to want to stay with those businesses. studying the specific field of psychology which can best help Regina achieve her goals is  industrial psychology.
Industrial and organizational (I/O) psychologists focus on the behavior of employees in the workplace. They apply psychological principles and research methods to improve the overall work environment, including performance, communication, professional satisfaction and safety. Industrial-organizational psychologists may find employment in the public sector, private sector, nonprofit sector, marketing, human resources, and consulting.
To learn more about industrial psychology here
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The Europeans brought many diseases with them that decimated Native American populations
        
             
        
        
        
Economic factors including especially the level of technology attained by a particular society and the economic relations into which men enter on the basis of that technology exert a decisive influence on the course of political, social, and intellectual evolution is known as economic interpretation.
<u>Explanation:</u>
An Economic Interpretation of the Constitution of the United States argues that the structure of the Constitution of the United States was motivated primarily by the personal financial interests of the Founding Fathers; Beard contends that the authors of The Federalist Papers represented an interest group themselves.
Basically, Beard argued that the U.S. Constitution was adopted in order to protect the rights and interests of the wealthy, upper-class members of society. The 'Founding Fathers' were members of this upper-class group.
 
        
             
        
        
        
"Change form"  
-The transition of one rock into another by temperatures and/or pressures unlike those in which it formed.