Anyone wants to help me with this 4 questions? Thank you!!!

What is the difference between an independent and a dependent variable?

Which economic system has become associated with authoritarian governments and total control of the economy? a. capitalism b. mercantilism c. communism d. socialism e. barter

During the world war 2 the united states government detained 11,000 , german-americans and isolated them in camps for the duration of the war. which term refers to this process