C) From deciphering the writing they left behind
Societies are naturally diverse and its easy to see why it is.
Interests: Some people prefer to stay inside and use a lot of electronic devices. While others prefer nature and the outdoors, so they go hiking an camping.
Beliefs: This is an easy example, the united states has many churches with many religions, so the belief systems are different.
Age: Even in your house, age diversity is present! You might be 15 while your parents are 35, and your grand parents are 73! This a common form of age diversity.
Hope I helped. :)
In 1980, the Department of Health, Education, and Welfare was split. The Department of Education became its own entity and the Department of Health and Human Services also became its own entity with the Welfare sector falling beneath it.