What was the motivation for rural-to urban migration, or moving from farms to the cities?

the motivation for rular to urban was for to cultivate them self

a. competition with other nations.

no options provided, here,but the answer to this question is often: a historian cites a japanese newspaper article published a year after the end of world war ii in order to draw conclusions about the effect of the war on the japanese economy.

clearly from the answer, the historian alludes to historical sources,and records to aid in analyzing and drawing conclusion on the effect of the war on the economy of japan.