What is the main difference between primary and secondary sources?

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

Why did the 24th amendment and the civil rights act succeed when other legislation had failed?

The date a source was created is considered part of its historical context intended audience purpose point of view