Answers:
It includes Microeconomics and Macroeconomics.
Microeconomics - demand and supply, various forces influencing the market and the industry,
Macroeconomics - ancient theories of economics, national income, inflation, deflation, foreign exchange,etc.
Rather than keeping on asking, please buy a book and have a brush through and start learning.
I would be overwhelmed had you asked any doubts on the same.
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