<u>"Acculturation"</u> refers to changes that result when groups come into continuous firsthand contact.
Explanation:
Acculturation is defined as the process of change in a group of people to another group, that change can be sociological, cultural or psychological. for example a person belongs to another country having his own culture migrated to another country and adopted the culture of that country, this refers to acculturation.
The Doppler effect is characterized by the change in the sound frequency emitted by a source, perceived by an observer when there is relative movement. A typical example of the Doppler effect is the case of an ambulance with the siren on, during the approach or removal of an observer.
