Please help.. This is the question for the upcoming test

Discuss with your friends the various types of change that you have experienced in last one year's time as adolescents? Explain.​

How did the growth of railroads american businesses expand

What is grievance 28 on the declaration of independence explained in simpler words? plz

Why are the majority of the world's economies mixed? what may happen to the "pure" types of economies (traditional, socialist/command, market capitalist) when they incorporate elements from other economic models?