6. The best definition of equilibrium is: n. a point where there is no tendency toward change
b. the point where output occurs within a market
c. when the economy is producing along its PPC
d. the condition that determines the price in a market
e. both b and d are correct​

Communism there is No private ownership,central government,No class Distinction, Production for basic needs.

For socialism there is limited Private owner ship, government and private entities,Limited class distinctions and production for societal needs .