using three practical example from your cultural background demonstrate the assertion that cultural is dynamic and socially created

This example applies to standard American culture:

Religion: most people in America are Christians, both Protestant and Catholic. Before Europeans came, Native Americans had their own religions, and in recent times, Catholicism has grown due to the migration of Hispanics, who are majority Catholic.Economic activity: until the mid 18th century, the majority of Americans were farmers. Ever since, industry, and later, services, became the economic occupations of the majority of people.Language: in the Midwest. German used to be spoken by a large part of the population. With time, due to both americanization, and repression, German essentially disappeared, and English became the majority language.