Answer:
2. acculturation
Step-by-step explanation:
Acculturation - 
It is process where the cultural , psychological and social changes are balanced between any two cultures , which adapting the prevailing one in the society , in referred to as acculturation. 
In this method , the people adapts to a particular new culture of the society. 
In order to learn and adapt and live along with the society .
The people actively tries to adapt to the new prevailing culture by increasing participation. 
Hence , from the given information of the question, 
The correct term is acculturation.