Compass--this originated in China and made its way through Africa, the Muslim Empires and Europe.
The magnetic compass became important during sea voyages in navigating the direction of the boats. This method was more reliable especially when the sailors were unable to see the stars to direct navigation.
Answer:
Strike
Explanation:
Historically, the strike has been the most potent union tactic when collective bargaining efforts break down. Strikes are organized protests in which workers stop working. Most of the time, these are organized by unions, and they are intended to achieve a particular benefit for the workers, such as better hours or pay. These were developed during the Industrial Revolution and were able to achieve great results.
The condition that characterized early medieval Europe were very poor conditions together with outbursts of plague, poverty and a lot of religious activities which involved the catholic church. Together with wars and a lack of safety, these times provided very bad outcomes for a lot of people.
