In a command economy, the government provides everything EXCEPT:

In a command economy, the government provides everything except food: Everything else is provided by the State.  The government makes the decisions and people are paid just enough for their needs.  The economy is also subsidized by the government since there is no private ownership in a command economy. Benefits also comes from the government. Food is something people buy with their earnings.

credit to meerkat18

answer; i believe that the correct answer is (scientific approach)

changes in factors like average income and preferences can cause an entire demand curve to shift right or left. this causes a higher or lower quantity to be demanded at a given price. demand curves relate the prices and quantities demanded assuming no other factors change. it is important for consumers to know this information, because it is crucial for them to know what they can afford and can't afford. i hope this .