Which is not an example of resonance? 
Definitions:
Nineteenth-Century Idea
A concept, doctrine, or movement that gained prominence or was innovated in the 19th century, influencing various aspects of society, politics, economics, or culture during that period.
Gender Roles
Social and behavioral norms that are considered appropriate for individuals of a given sex within a specific culture or society, often influencing aspects of daily life and personal identity.
Forty-Acre Plots
Part of post-Civil War Reconstruction plans, famously associated with General Sherman's Special Field Orders, No. 15, intended to redistribute Southern land to freed slaves as compensation.
Wage Labor System
An employment system where workers sell their labor in exchange for wages, typically prevalent in capitalist economies.
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