Answer: Pre-Columbian refers to the history and culture of North and South America before the arrival of Christopher Columbus.
I think you already have it in order? At least, it looks correct to me.
Negative affects- poor working conditions, poor living conditions, low wages, child labor and pollution.(make sure u put those into different words)... positive affects- increase in wealth, the production of goods, and the standard of living. People also had access to healthier diets, better housing and cheaper goods. don’t copy this word for word try to make it sound like you wrote it
a sceince specific school book or website