Mixed economies O alternate between command and market economic systems every two years
O have characteristics of both command and market economic systems
O only exist in the Eastern hemisphere
O are the most efficient economic systems

There are four of them, hope this helped! There is Europe, South America, North America, and Oceania!

Explanation:

PLEASE MARK ME BRAINLESS

a.indigo and cochineal

b.animal hides

c.silver and gold

e.cacao beans and sugarcane

answer; i believe the correct answer is prefrontal cortex;