Opportunity Cost: e. What must be given up in order to gain something else
Incentive: c. Whatever makes a person act or choose
Scarcity: b. The limited amount of necessary or desired resources
Microeconomics: d. The study of individual economic actors. For example: how individuals, households, or businesses interact economically
Macroeconomics: f. The study of large economic systems and how their decisions affect issues such as unemployment, price, and trade
Economics: a. The study of how a society manages its scarce resources