Tech made the 20s roar because alot of movies (silent or not) came out in the 1920s and there was alot new tech like the radio, silent movies and Henry Ford's automobile industry were invented.
The Harlem Renaissance made the 20s roar because it was a intellectual, social, and artistic explosion that took place in Harlem, New York, spanning the 1920s. The Harlem Renaissance was considered to be a rebirth of African-American arts. It introduced jazz, a new style of music. With artists like Neil Armstrong.
The Great Migration made the 20s roar because 6 million African Amaricans traveled to the north, it was a huge movement so thats why it stood out.
Womens Sufferage made the 20s roar becuase after years and years of protesting and wishing for the right to vote (since 1848) they finnaly got it which made the 20s stand out from the rest.