The problems between different cultural groups were caused by: C. a wave of immigrants moving to the cities of the northeast.
<u>Explanation:</u>
A cultural group is defined as a group of people who follows same beliefs, patterns of behavior, and values. The cultural group is identified by their behavior and way of thinking.
During 1850, the Northern cities have different cultural group. There were many conflicts between the cultural groups. This is was due to immigrants moving to the cities of the northeast.
Immigrants are people who move from their own country and settle down in another country.
They protected early civilization from most invaders, is the correct answer. The Himalayas have been shielding India from outside invaders since the early occasions.
