Answer:
Urbanization- the growth of cities, the development of a previously non-populated area.
Explanation:
Sub-urban: A decently sized neighborhood.
Remove the sub, which in this case means 'smaller'
Urban: A large city, take NYC for example.
Segregation: The separation and discrimination of different races and ethnicities- There is the time period[t] of Martin Luther King Jr., you likely heard of it.
Industrialization: The evolvement of man-made technology, for example:
From hand-milked cows, to automatic. This took around six years from when it first was thought of.
Commercialization: Moving from a local business with handmade products, to mass produced products. (I believe, I haven't heard the term in a while)
(Thought I might as well get the points for answering haha)
