<span>a.
Numerous
attempts to unite Greece under one government
b.
Frequent wars between city
-
states
c.
Heavy trade between city
-
states
d.
Increased efforts to establish Greek colonies overseas
</span>
Sweatshops were factories that treated the workers unfairly which could consist of low wages, poor environment, and possibly working long hours.
The correct answer should be <span>b. the Industrial Revolution
It is after this period and during, that labor groups began to organize themselves.</span>
The renaissance was a history period lasted during fifteen and sixteen centuries A.C that represents a middle point between middle and modern ages. Leonardo DaVinci, was a scientist who lived between 1452 and 1519. Leonardo was considered a genius advanced for his age and always fight against the church ideas who considered the man never would had the need to search the truch and was only necessary the belief on a superior being, while DaVinci believed the human being has the ability to find the truth and change the world for good.