How did imperialism nationalism and militarism contribute to making this a world war

World War I

Explanation:

Due to alliances between all the countries, as well as different thoughts on rule. Since a lot of WWI countries was still empires.

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.