The answer is: Culture as shared ideas
Culture as a shared idea refers to a set of beliefs or behaviors that have similar characteristics because it come from the same background.
In the example above, the similarities of beliefs that Joe and Sarah have come from the fact that they are both held a christian religion. The difference arise because the religion that they adopt are considered to be a sub-culture that derived from one main culture. (christian in the main culture, baptist and Lutheran are the sub-culture)
The Nile River, The Congo River, The Niger River, and The Zambezi River
The current form of American government is very flawed, but it is effective in the sense that it is capable of changing without revolution, which is the most important element of any government.
Chemical contamination is when chemicals from industries or harmful sprays in farming get washed off into bodies of water.