One mostly negative effect of urbanization was the establishment of O factories.
O railroads.
O slums.
O stockyards.

Slums

Explanation:

EZ the slums are the only negative part that i can see of the four answers Brainleist pls :)

length of the cultivating season was not a problem of new england agriculture

the hyksos invasion. the hyksos were able to attack egypt successfully because of their skills in using bronze weapons, composite bows and the use of the horse and chariot during the invasion. although the egyptians depict a barbarian-type overthrow, the truth is the seizure was likely a relatively peaceful one.