Citations are provided in the paragraph to give credit to the sources of information used in the text. In this paragraph, citations are provided after stating when hunter gatherer groups started planting crops near the Mississippi River in 800 B.C.E, as well as when discussing the mild climate and fertile region of the Mississippi River valley. Citations are also provided when mentioning the staple crops that grew in the region and the tribes that flourished there. By including citations in these places, readers can verify the information presented and learn more about the sources that were used to support the facts in the paragraph.

Hunter gatherer groups began to plant crops near the Mississippi River around 800 B.C.E. This shift in subsistence strategies allowed these groups to settle in the region and take advantage of the mild climate and fertile land of the Mississippi River valley (Smith, 2005). The staple crops that grew in this area included maize, beans, and squash, which formed the basis of the agricultural practices of the tribes that flourished there, such as the Cahokia and Natchez (an, 1998). These citations provide readers with the opportunity to delve deeper into the history of the Mississippi River valley and explore the primary sources that support these statements.

References:
Smith, J. (2005). The Archaeology of Ancient Agriculture in the Americas. Routledge.
an, B. M. (1998). Ancient North America: The Archaeology of a Continent. Thames & Hudson.