Answer:
assimilation
Step-by-step explanation:
In the process of cultural assimilation a minority group tends to resemble the dominant group in terms of the their culture. The minorities incorporate the culture of the dominant group without losing their own culture.
Here, Fernando and Olivia have adopted the culture and traditions of the dominant group in the United States. They have not lost their own culture but have adopted what is to be expected from the majority group.
Hence, Fernando and Olivia are experiencing assimilation.