Question 4 10 pts
Read the section "Human-Environment Interaction."
How does this section contribute to the development of the article's MAIN ideas?
O It emphasizes the importance of studying all five themes.
O It describes the ways that the environment can affect people.
O It shows that humans make an impact on the world.
O It explains why people mine for coal and drill for natural gas.

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?