Answer:
Microeconomics. Microeconomics is the most essential in understanding the economy as a system. ...
Macroeconomics. Macroeconomics, unlike microeconomics, examines the economy as a whole. ...
International Economics. International economics analyzes the flow of goods and services between nations. ...
Theory. ...
History.
Step-by-step explanation:
im not 100% sure of this... but i really hope this helped!l