How are the roles of resource owners and firms explained by the circular flow diagram of economic activity?

How did the great depression affect the farmers? Why was the US vulnerable to OPEC? How should we conserve public wealth? Do modern trade agreements designed to balance the flow of goods among countries have their theoretical roots in constitutionalism? What are some economic conditions that affect the cost of money? How did the capability to produce more good in less time help lower costs? What is the number 4.7 million? Why did many mines eventually close? Flowchart price of lumber increases cost of manufacturing increases? What does a low standard of living mean? Can a marginal tax rate ever be negative? What are the main qualities that a good entrepreneur will need to have to be a success in business? Should you increase taxes or cut taxes? Difference between net sown area and gross crop area? What are the pros and cons of keynesian economics? What is the basic support systems needed to keep an economy going? What are a firms profit at the break-even point? What is the negative carry on CRR and SLR? What stressor belongs to the macro-level category? What caused the American economy to slip in the 1970s?