The cultural makeup of the u. s. population has changed over the past few years because of immigration and other factors. such long-term changes in the genetic and cultural makeup of a population are part of?

Normative history-graded influences.

Explanation:

Normative history-graded influences are events that affect the majority of the people in a community making a change in their culture. Inmigration is a factor that changes a culture because it introduces new traditions, points of view, objects, etc. Another thing that can make a normative history-graded influence is when people from the United States have children with inmigrants or inmigrants' descendants because they are modifying the DNA of a population that has certain characteristics

b

is correct hope this   also i learnd this in middle school

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