Answer:
A similar type of symbol cropped up independently in the Americas sometime around 350 A.D., when the Mayans began using a zero marker in their calendars. These early counting systems only saw the zero as a placeholder—not a number with its own unique value or properties
They believed that it was unlawful to force children to attend public schooling when their parents might not want it, and saw it as an infringement of rights. Furthermore, many children were home schooled at the time, though this trend was declining, so public school wasn't seen as so much of a necessity.
War started mainly because: Militarism, Alliances, Imperialism and Nationalism. Big armies become threats to other countries then other countries force alliances
The overall cause of World War was the assassination of Archduke Franz Ferdinand.
Answer: Because of the following
-Diverse climates
-Diverse natural resources
-Groups adapted to suit resources/climates
-Migration introduced different adaption techniques
I don’t know how to Splaine that for real though
