Answer:
Cultural diffuson can occur due to close contact among social groups or trade.
Explanation:
One example of cultural diffusion occured in Palestine before World War II. Jewish People who lived there were in close contact with the Arab Palestinian population, and despite still being Jewish, they spoke Arabic as a mother tongue.
Another example is the Columbian exchange, one of the most important cultural exchanges in history. Trade between the Americas and Europe brought important American goods like corn, tomatoes, and potatoes to Europe, and crucial European goods like wheat, oats and barley, to the Americas.
