A consensus is an important skill a leader should posses in order to unite his subordinates. in a group, every person have different ideas on how to tackle things, so it must be the task of the leader to make the general agreement on what to do, he must have the right judgement
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.
Manorialism was "<span>a structure that defined a peasant’s relationship to the lord of the manor," since this was at the heard of the feudal system, which provided "protection" to the peasants and labor to the lords. </span>
When the Nile flooded, it left behind rich, black soil.
D.