According to aristotle, which element of tragedy is the most important?

Consider the demand for an inferior a good illustrated in the graph below suppose income decreases what effect would this have on the graph

Which is the main inference that can be drawn from adam smith's book the wealth of nations? a) for an economy to work flawlessly, it shouldn't have to serve and moral goals. b) the government must control a free-market economy, or economic problems will arise. c) a free-market economy works well only without the government's interference. d) free trade will only hurt economies and should be stopped by governments.

How do private property rights serve as an incentive in a free enterprise economy ?