The overall goal of labor unions during the late 1800s and early 1900s was to protect workers from heavy abuses by their employers--abuses such as working incredibly long hours and working in very dangerous factory conditions.
A. Around 70 presente of Japan's population lives in the region between Tokyo and Osaka.
<h2><em>ANSWER/</em><em>:</em></h2>
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Answer:
It occurred because it was cheaper and businesses could retain more money and underpay their workers. The practical reasons are that children are faster, they can fit into smaller spaces and are more controlled.