I suggest that you start by doing some web searches. There is an enormous amount of information on the Mississippi available. Use diagrams if you find it illustrates your point best. We talked in class about rivers as agents of erosion and deposition and sculpting the landscape. We also talked about valley and floodplain development.
Humans like to live in floodplains, fertile soil, plenty of water, flat surfaces.
It is good for agriculture and survival. In the United States the largest floodplain is that of the Mississippi River drainage basin. The Mississippi outputs its discharge in the Gulf of Mexico in a large delta. Briefly describe the Mississippi River, including a description of where it originates, of the extent of its drainage basin and tributaries, the development of its floodplain and whether it is a young, mature or old river system. Include information on its historical discharge evolution.