What do the ancient civilizations of china, egypt, and greece have in common with regard to sports?

They all organized athletic games that recurred annually.

Explanation:

This is the element that all these different civilizations shared. China, Egypt and Greece all organized athletic games that recurred annually. Sports were an important part of these civilizations. Moreover, the sports they practiced were not only intended to serve a physical purpose. They also had a spiritual and often a religious component.

slavery, abortion, donald trump, gay marriage, racial rights, immigration  

explanation:

anything that has been broth up to the supreme court is something of grate political divide   so just look as court cases

on this day in 1913, henry ford installs the first moving assembly line for the mass production of an entire automobile. his innovation reduced the time it took to build a car from more than 12 hours to two hours and 30 minutes.