What are the key traits of a civilization

Political rights for women grew most rapidly on the western frontier primarily because (1) the settlers were influenced by native american indian societies (2) women greatly outnumbered men in the west (3) pioneer life often required men and women to share responsibilities equally (4) immigrants settling in the west brought ideals of gender equality from europe

From 1990 to 2008, by what percent did the world’s most developed economies cut their greenhouse gas emissions?

What is the main social system that existed in ancient china?