According to the short-run phillips curve, when actual real gdp is potential output, the price level and the unemployment rate falls. below; increases above; decreases below; decreases above; increases
your answer would ether be a place where you buy and sell stock or an organized way for people to but and sell stocks.
macroeconomics is an economics branch that is concerned with the behavior, structure, performance, and decision-making of an economy as a whole. it tends to deal with high-level econometrics including those at a global scale. in contrast, microeconomics, tends to focus on how individuals make decision based on scarce resources.
thus, from these explanations, the correct answer for the question is (b) tightening the family budget, which is a form of microeconomics.