They had to learn a new language and get used to new customs and creating a familiar and comforting space
Answer:
Aryans
Explanation:
Also around 1500 bc, a group of people who called themselves Aryans invaded the Indian subcontinent, and came to dominate most of the original Dravidian people. The Aryans spoke a language related to the western European languages, and came from the Russian steppes.

An urban area is the answer.

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Inside these factories there sometimes were no good ventilation(no windows), many frequent accidents would happen and many children would start working very early maybe starting by the age of 6 yrs old if there parents weren't there to supervise them
The qin dynasty expanded the trade routs on the silk road